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.[BW] APR 11-12 HON SEM 2 REVIEW__3 ENERGY

Authored by R Hefter

Chemistry

7th Grade

Used 2+ times

.[BW] APR 11-12 HON SEM 2 REVIEW__3 ENERGY
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10 questions

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1.

MULTIPLE CHOICE QUESTION

30 sec • 2 pts

The average kinetic energy of the particles in a sample of matter is measured as the ___?___

kinetic force

thermal rate

reaction rate

temperature

2.

MULTIPLE CHOICE QUESTION

30 sec • 2 pts

What type of energy is stored in chemical bonds?

Chemical potential energy

Chemical kinetic energy

Thermal potential energy

Thermal kinetic energy

3.

MULTIPLE CHOICE QUESTION

30 sec • 2 pts

Calculate the heat transferred (q) when 440 g of water cools from 87.2°C to 50.0°C. (C = 4.18 J/g°C)

68000 J

-2.8 J

-3900 J

2.8 J

-68000 J

4.

MULTIPLE CHOICE QUESTION

30 sec • 2 pts

If 238 J of heat is absorbed by a sample of metal with a mass of 40.7 g, and it raises the temperature from 20.0°C to 32.4°C, what is the specific heat capacity of the metal?

2.34 J/g°C

6.13 J/g°C

0.472 J/g°C

0.163 J/g°C

5.

MULTIPLE CHOICE QUESTION

30 sec • 2 pts

A sample of iron receives 50.0 J of heat energy that raises the temperature of the iron 25.0°C. If iron has a specific heat of .10 J/g°C, what is the mass of the iron sample?

0.200 g

20.0 g

30.0 g

50.0 g

6.

MULTIPLE CHOICE QUESTION

30 sec • 2 pts

If a reaction is endothermic, which statement below best describes the energy of the products and reactants in the reaction?

Energy is given off during the reaction, making the energy of the products greater than the energy of the reactants.

Energy is absorbed during the reaction, making the energy of the reactants greater than the energy of the products.

Energy is given off during the reaction, making the energy of the reactants greater than the energy of the products.

Energy is absorbed during the reaction, making the energy of the products greater than the energy of the reactants.

7.

MULTIPLE CHOICE QUESTION

30 sec • 2 pts

∆H is positive

endothermic

exothermic

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