Identify two ways that temperature plays a role in chemical changes.

Answers

Answer 1

Answer:

Increasing the temperature will cause chemical changes to occur faster. Decreasing the temperature, causes the particles to lose energy which causes them to move around less and slower. The less they move, the less collisions occur, and the less reactions occur between the chemicals = slower reaction rate.

Explanation:


Related Questions

If I initially have a gas at a pressure of 1260 kPa, a volume of 23 liters, and a temperature of 200 K, and
then I raise the pressure to 1595 kPa and increase the temperature to 300 K, what is the new volume of
the gas?

Answers

P1 x V1 P2 x V2
______ = ________
T1 T2

1260 x 23 / 200 = 144.9

1595x V/300

144.9= 1595x V/300
144.9 x 300/1595 = v
27.25 litres
I think

Which is a physical change? A) Rusting iron B) Burning paper C) Reacting baking soda and vinegar D) Separating a mixture of salt and wat

Answers

Answer:

D

Explanation:

1) What experimental condition is required for the heat change in a reaction to be numerically equal to the enthalpy change (ΔH)?


2) When 1 mol of nitrogen gas reacts with 3 mol of hydrogen gas, 2 mol of ammonia gas is produced and 92.6 kJ of heat is released. Write the thermochemical equation.

Answers

Answer:

Answers are in the explanation

Explanation:

1) The constant pressure is necessary during a reaction. Thus, the heat released in the reaction will be = ΔH

2) The reaction described in the problem is:

1 N₂(g) + 3H₂(g) → 2NH₃(g)

The thermochemical equation involves the change in heat, as 92.6kJ are released, the heat must be wrote as another reactant, that is:

N₂(g) + 3H₂(g) → 2NH₃(g) + 92.6kJ

On a hot day, a 15.0 kg window increased from 20.0 degrees C to 26.7 degrees C. How much heat energy did the glass window absorb? (specific heat of glass = 0.840 J/gC)

Answers

Answer: The heat energy absorbed by the glass window is 84420 J.

Explanation:

Given: Mass = 15.0 kg (1 kg = 1000 g) = 15000 g

Specific heat capacity = [tex]0.840^{o}C[/tex]

Initial temperature = [tex]20^{o}C[/tex]

Final temperature = [tex]26.7^{o}C[/tex]

Formula used to calculate heat energy is as follows.

[tex]q = m \times C \times (T_{2} - T_{1})[/tex]

where,

q = heat energy

m =  mass of substance

C = specific heat capacity

[tex]T_{1}[/tex] = initial temperature

[tex]T_{2}[/tex] = final temperature

Substitute the values into above formula as follows.

[tex]q = m \times C \times (T_{2} - T_{1})\\= 15000 g \times 0.840J/g^{o}C \times (26.7 - 20.0)^{o}C\\= 84420 J[/tex]

Thus, we can conclude that heat energy absorbed by the glass window is 84420J.

Lead, gold mercury, aluminum which one has the lowest heat capacity?

Answers

Gold is the answer; Gold is a heavy metal with a very low heat capacity

What are the three parts of modern cell theory. Choose all that apply.
A.) The cell is the smallest living unit in organisms


B.) All cells come from other pre-existing cells


C.) All living things are made of cells


D.) All organisms are multicellular

Answers

Answer:

a,b,c

Explanation:

Answer:

C

...................

Which species is the reducing agent in a redox reaction? Chem is hard​

Answers

Answer:

The species that furnishes the electrons is called the reducing agent. In this case, the reducing agent is zinc metal.

Explanation:

Hopes this helps. Mark as brainlest plz!

In a redox reaction, the species which is oxidized acts as the reducing agent.

In a redox reaction, The substance losing electrons is the reducing agent and is being oxidised. The substance that gains electrons is the oxidising agent and is being reduced.

An oxidising agent isdefined as a substance that causes oxidation by accepting electrons and thus becoming reduced.

A reducing agent is defined as a substance that reduces by losing electrons and thus becomes oxidised.

Substances that have the ability to oxidise other substances are referred to as oxidising agents or oxidants

Substances that have the ability to reduce other substances are referred to as reducing agents or reductants.

To know more about Redox reaction

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The question should be

Which species is the reducing agent in a redox reaction?

How many atoms are in 2.2 moles of Zinc?

Answers

There are 1 .5 million atoms in moles

What is the pressure of 13.7 mol of acetylene in a 48.1 L cylinder at 67.0 °C?

Answers

Answer:

hinojosa has caught you cheating

Explanation:

ur mom

\

Select the correct structure that
corresponds to the name.
4-bromo-5-chlorocyclohexene

Answers

Answer: a

Explanation:

Which of the following has the most energy?

heat
ultraviolet rays
the color blue
radio waves

Answers

Answer:

C

Explanation:

Ultraviolet rays I believe is the answer








7. When a log is thrown on a fire it seems to lose weight; what happens to its physical mass?
a. It disappears
b. It is released into the air
C.
It becomes energy
d. The log does not change weight or size

Answers

Answer:I think it would be D.

Explanation:The law of conservation of mass states that matter cannot be created or destroyed in a chemical reaction. For example, when wood burns, the mass of the soot, ashes, and gases equals the original mass of the charcoal and the oxygen when it first reacted. So the mass of the product equals the mass of the reactant.

Someone help me with this question please

Answers

Answer:

step 2

Explanation:

ofcourse rocks dont melt

maybe lol

What will the change in temperature be when 90 J are applied to 15 g of gold. (cgold = 0.126 J/g°C)

Answers

Answer:

47.6°C is the change of temperature

Explanation:

To solve this question we must use the equation of specific heat of a material:

Q = m*ΔT*S

Where Q is heat applied = 90J

m is the mass of the substance = 15g gold

ΔT is change in temperature = Our incognite

S is specific heat of the material = 0.126J/g°C for gold

Replacing:

90J = 15g*ΔT*0.126J/g°C

90J/15g*0.126J/g°C = ΔT

ΔT = 47.6°C is the change of temperature

What element is this? Is it a neutral atom or ion?

Answers

Hydrogen I think and it’s neutral all atoms have one molecule

71.1 mL of 0.695M rubidium hydroxide neutralized 89.7mL of sulfuric acid and solution of unknown concentration. Find the concentration of the acid

Answers

Answer: Concentration of the acid is 0.551 M.

Explanation:

Given: [tex]V_{1}[/tex] = 71.1 mL,      [tex]M_{1}[/tex] = 0.695 M

[tex]V_{2}[/tex] = 89.7 mL,           [tex]M_{2}[/tex] = ?

Formula used to calculate the concentration of acid is as follows.

[tex]M_{1}V_{1} = M_{2}V_{2}[/tex]

Substitute the values into above formula as follows.

[tex]M_{1}V_{1} = M_{2}V_{2}\\0.695 \times 71.1 mL = M_{2} \times 89.7 mL\\M_{2} = 0.551 M[/tex]

Thus, we can conclude that concentration of the acid is 0.551 M.

PLEASE HELP QUICKLY!!
I know it's not A or B; I just can't figure it out between C and D.
---

What will most likely happen when a component is added to a reaction system at equilibrium?

A. The system will be unaffected by stress.
B. The addition of a catalyst will change the equilibrium.
C. The equilibrium position will shift away from what was added to lower its concentration.
D. The equilibrium position will shift away from what was added to increase its concentration.

Answers

Answer:

c: The equilibrium position will shift away from what was added to lower its concentration.

Explanation:

Answer: C. The equilibrium position will shift away from what was added to lower its concentration.

Explanation:

If we have a system that is already in equilibrium, the addition of an extra amount of one of the reactants or one of the products throws the system out of equilibrium. Either the forward or the reverse reaction will then occur to restore equilibrium conditions.

10 points! Please help if you know the answer I need to get 100% on this test :)

Answers

Answer:

Metal has an high capacity, which allows it to heat up faster and transfer the heat to the contents of the pot or pan.

Explanation:

Because metal pots are made from a narrow range of metals because pots and pans need to conduct heat well.

An electric kettle uses electrical energy to boil water. Energy from the electricity is transferred to the water, heating it up. An electric ice maker also uses electrical energy, but it freezes water to form ice. Since energy can’t be created or destroyed, and water loses potential energy when it freezes to form ice, what happens to the energy put into the ice maker and the energy released by the water?

Answers

Answer:

Since energy can’t be created or destroyed, and water loses potential energy when it freezes to form ice. The energy remains electrical but then changes to kinetic when Enough energy is released.

Explanation:

Answer:

Explanation:

The overabundance of electrical energy acquired by water during the ice framing process is taken out as likely energy to keep up with the law of energy conservation. The electrical energy given to the ice generator pivots the engine inside the blower (compressor). The coolant available inside the blower is compressed and this pressure is accomplished alongside the creation of heat energy. The heat energy is delivered into the external encompassing air of the ice generator. This prompts a drop in the temperature of the coolant.

This coolant courses inside the ice generator and soaks heat energy (heat stream from the heater to the colder area) from the water as it gets once again to the blower, Thus prompting cooling of water and development of ice.

During a combustion reaction, 9.00 grams of oxygen reacted with 3.00 grams of CH4.

What is the amount of the leftover reactant?

0.74 grams of methane
0.89 grams of methane
1.22 grams of oxygen
1.45 grams of oxygen

Answers

Answer:

0.74

Explanation:

this is the correct answer. I followed a correct answer that had the same probelm with different values, swithxed it with mine, and got 0.75. So its basically 0.74

Give reasons why an element can be broken down...pls explain widely​

Answers

Elements cannot be broken down into another substance.

what is the symbol of gold ​

Answers

Explanation:

Tha Symbol of gold is Au.

Answer:

symbol of gold is Au

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is a shark asexual, sexual, or both

Answers

Answer:

Both

Explanation:

Please mark brailiest

Answer:

A shark is both

Explanation:

Type the correct answer in the box. Express your answer to three significant figures. Iron(II) chloride and sodium carbonate react to make iron(II) carbonate and sodium chloride: FeCl2(aq) + Na2CO3(s) → FeCO3(s) + 2NaCl(aq). Given 1.24 liters of a 2.00 M solution of iron(II) chloride and unlimited sodium carbonate, how many grams of iron(II) carbonate can the reaction produce? The reaction can produce grams of iron(II) carbonate.

Answers

Answer:

Explanation:

To solve this problem we have to find the moles of iron(II) chloride that react. Using the chemical equation, we can kknow moles FeCl2 = Moles FeCO3. Thus, we can find the moles of FeCO3. Converting these moles to grams using its molar mass -Molar mass FeCO3: 115.854g/mol-

Moles FeCl2 = Moles FeCO3:

1.24L * (2.00mol / L) = 2.48 moles FeCl2

Mass FeCO3:

2.48mol * (115.854g / mol) =

The reaction can produce 287 grams of iron(II) carbonate

Answer:

its 287

Explanation:

i got it right on edm

Balance the following equations.

Answers

Answer:

A) Mg + H2SO4 → MgSO4 + H2

B) CaCO3 + 2HCl → CaCl2 + H2O + CO2

C) CaO + H2O → Ca(OH)2

D) 3Ag + 4HNO3 → 3AgNO3 + H2O + NO2

Explanation:

A) Mg + H2SO4 → MgSO4 + H2

The equation is already balanced because the number of each element in the left hand side is already equal to that in the right hand side.

B) CaCO3 + 2HCl → CaCl2 + H2O + CO2

This equation is balanced by putting 2 in front of HCl on the left hand side to balance the elements on the right hand side.

C) CaO + H2O → Ca(OH)2

Thus equation is already balanced because the number of each element in the left hand side is already equal to that in the right hand side.

D) 3Ag + 4HNO3 → 3AgNO3 + H2O + NO2

This equation is balanced by putting 3 in front of Ag and 4 in front of HNO3 on the left hand side while we put 3 in front of AgNO3 on the right side to balance the elements on the right hand side.

A student measured the pH of his soda and found it to be 4.5.


Calculate the [H3O+] in the soda.

Answers

Answer:

0.0111 M

Explanation:

pH = 4.5

[H3O+] = ?

Relationship between both quantitiesis given by:

pH = -log₁₀ [H3O+]

-pH = log₁₀ [H3O+]

-4.5 =  log₁₀ [H3O+]

[H3O+]  = e ^ (-4.5)

[H3O+] = 0.0111 M

Need this asap!!!

Which type of substance gives off hydroxide ions when dissolved in water?
Acid
Base
Gas
Metal

Answers

Answer:

Acid

Explanation:

A compound that produces hydroxide ions when dissolved in water is a base i believe

Give three examples of energy traveling in waves

Answers

Answer:

ELECTROMAGNETIC SPECTRUM. Radios, televisions, mobile phones, and radar use signals made up of electromagnetic waves. These are waves that carry energy as electricity and magnetism at the speed of light. Light we can see is also an electromagnetic wave, but other types of electromagnetic wave are invisible.

Explanation:

~Hope this helps

In the process of fossil formation, what materials replace the
organism's remains?
A. ice
B. minerals
C. soil
D. water

Answers

c. soil. If this isn’t C it’s definitely B.

Answer:

D.water

Explanation:

Petrified fossils form when minerals replace all or part of an organism. Water is full of dissolved minerals. It seeps through the layers of sediment to reach the dead organism. When the water evaporates, only the hardened minerals are left behind.

Consider the following statements about weeding and identify the incorrect one.

a) Weeding is best done during tilling itself.
b) Weeding is the process of growing weed.
c) Weeding is the process of removal of weeds.
d) Weeding is usually done manually or by using weedicides.

Answers

Answer:

b) Weeding is the process of growing weed

Explanation:

Wedding is an agricultural process carried out to ensure maximum you won't do. It is the process by which weeds i.e. unwanted plants are removed.

As rightly stated in the question;

- Weeding is either done by manual means e.g Cutlasses or use of weedicides, which are chemicals.

- Weeding is best done during tiling operations.

The incorrect option is that "Weeding is the process of growing weed" rather it is a process of removing weed.

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