EPHS HONORS CHEM Energy and Chemical Change Exam 8 module 14

Front

What is the formula to calculate heat energy (Q) transferred?

Back

Q = m * c * ΔT, where m is mass, c is specific heat, and ΔT is the change in temperature.

Front

What is specific heat?

Back

Specific heat is the amount of heat required to raise the temperature of 1 gram of a substance by 1°C.

Front

What is the specific heat of water?

Back

4.18 J/g°C.

Front

What happens to the temperature of a substance during an endothermic reaction?

Back

The temperature of the substance decreases as it absorbs heat from the surroundings.

Front

What is an exothermic reaction?

Back

An exothermic reaction is a chemical reaction that releases heat to the surroundings.

Front

How does the specific heat of a substance affect its temperature change?

Back

A substance with a lower specific heat will experience a greater temperature change than a substance with a higher specific heat when the same amount of heat is added.

Front

What is the relationship between temperature and kinetic energy?

Back

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

Front

What is the heat of vaporization?

Back

The heat of vaporization is the amount of energy required to convert a unit mass of a liquid into vapor without a change in temperature.

Front

How do you calculate the energy required to vaporize a substance?

Back

Energy = mass * heat of vaporization.

Front

What is the heat of fusion?

Back

The heat of fusion is the amount of energy required to change a substance from solid to liquid at its melting point.