Unit 8: Energy

The amount of heat gained or lost by a substance depends on all of the following EXCEPT

• The change in temperature of the substance.

• The change in volume of the substance.

• The mass of the substance.

• The specific heat capacity of the substance.

A reaction that gives off heat is known as a(n) ___________ reaction.

• Calorimetry

• Endothermic

• Exothermic

• Kilogram

According to the law of conservation of energy

• The amount of energy created is equal to the amount of energy destroyed.

• Potential energy is neither created nor destroyed.

• Energy cannot be converted from one form to another.

• The energy of the universe is constant.

Ability to do work and produce heat.

• work

• system

• energy

• heat

Stored energy

• potential energy

• kinetic energy

• temperature

• surroundings

energy of motion

• work

• kinetic energy

• heat

• specific heat capacity

force acting over a distance

• kinetic energy

• heat

• temperature

• work

measuring the change of heat in a chemical reaction

• heat

• specific heat capacity

• calorimetry

• surroundings

energy needed to raise temperature of 1 g of a substance 1^oC

• Specific heat capacity

• heat

• exothermic

• endothermic

How many joules of energy would be required to heat 24.2 g of carbon from 23.6^oC to 54.2^oC?

(Specific heat capacity of carbon= 0.71 J/g ^oC.)

• 532 J

• 430 J

• 530 J

• 530 g