Chemistry Unit 3 Final Review

The amount energy required to heat 1 gram of a substance by 1°C is defined as

• heat of fusion

• heat of vaporization

• specific heat

• gram heat

How much heat is required to melt 50.00 g of ice? The heat of fusion for ice is 334 J/g. Q = mxH_f

• 16700 J

• 0.150 J

• 6.68 J

• Not enough information

Using Q = mCΔT, determine how much energy is required to heat 10.0 g of aluminum from 15.0ºC to 65.0ºC if the specific heat of aluminum is 0.89 J/gºC.

• 134 J

• 445 J

• 579 J

• 8680 J

During which segment is the sample only in the solid phase?

• A

• B

• C

• D

• E

What is the boiling point of this substance?

• 55ºC

• 60ºC

• 85ºC

• 90ºC

Which line segment represents melting?

• A

• B

• C

• D

• E

During which part of the curve do the particles in the substance have the most kinetic energy?

• A

• B

• C

• D

• E

When you added Magnesium to hydrochloric acid, the test tube got warm. This is an example of an _______ reaction.

• endothermic

• exothermic

When ice melts, it feels cold because it is drawing in heat from the surroundings. This is an example of an ____________ change.

• endothermic

• exothermic