Heat

Question 1

Examine the image showing a pan of boiling eggs on a gas burner. What is the path of heat flow?

Revolt · Accepted Answer

burning gas pan water eggs

Question 2

Which units can be used to describe the thermal energy within a substance? Select all that apply.

Revolt · Accepted Answer

joules

Question 3

Which statement explains the flow of heat?

Revolt · Accepted Answer

Heat moves as molecules of one substance collide with molecules of another substance, transferring kinetic energy.

Question 4

Which statement accurately describes temperature?

Revolt · Accepted Answer

Temperature is a measure of the average kinetic energy of the molecules in a substance.

Question 5

Which units can be used to describe the temperature of a substance? Select all that apply.

Revolt · Accepted Answer

degrees Celsius; kelvins

Question 6

Which way does heat flow? from a substance of lesser thermal energy to one of greater thermal energy✔ from a substance of greater thermal energy to one of lesser thermal energy

Revolt · Accepted Answer

✔ from a substance of greater thermal energy to one of lesser thermal energy

Question 7

What type of process occurs when heat flows out of a system?

Revolt · Accepted Answer

exothermic

Question 8

Which chemical or physical change is an endothermic process?

Revolt · Accepted Answer

the melting of an ice cube

Question 9

Which statements about the reaction are true? Select all that apply.

Revolt · Accepted Answer

The reaction is exothermic; The equation shows that 891 kJ of energy are released as a product.; The graph shows that the reactants have greater potential energy than the products.

Question 10

Which chemical or physical change is an exothermic process?

Revolt · Accepted Answer

the combustion of gasoline

Heat Answers

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