Energy and Chemical Change

Energy is the ability to do work or produce heat.

• True

• False

The law of conservation of energy states that energy can be created and destroyed.

• True

• False

Chemical potential energy is energy stored in a substance because of its composition.

• True

• False

Heat is a form of energy that flows from a warmer object to a cooler object.

• True

• False

A calorie is the amount of energy required to raise the temperature of one gram of pure water by one degree Celsius.

• True

• False

A calorie is the SI unit of heat and energy.

• False

• True

The specific heat of a substance is the amount of heat required to raise the temperature of one gram of that substance by one degree Celsius.

• True

• False

Kinetic energy is energy of motion.

• True

• False

One calorie equals 4.184 joules.

• True

• False

If the temperature of a 500.0-g sample of liquid water is raised 2.00°C, how much heat is absorbed by the water? The specific heat of liquid water is 4.184 J/(g×°C).

• 4.18 kJ

• 418 kJ

• 0.418 kJ

• 4180 kJ