Thermochemistry Test Review

Front

What is thermochemistry?

Back

Thermochemistry is the study of the heat energy associated with chemical reactions and changes of state.

Front

What does it mean for a system to be closed in thermodynamics?

Back

A closed system can exchange energy (heat and work) but not matter with its surroundings.

Front

What is the law of conservation of energy?

Back

The law of conservation of energy states that energy cannot be created or destroyed, only transformed from one form to another.

Front

What is an exothermic reaction?

Back

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

Front

What is an endothermic reaction?

Back

An endothermic reaction is a chemical reaction that absorbs heat from its surroundings.

Front

How does temperature affect the rate of a chemical reaction?

Back

Generally, an increase in temperature increases the rate of a chemical reaction due to higher kinetic energy of the molecules.

Front

What is specific heat capacity?

Back

Specific heat capacity is the amount of heat required to raise the temperature of one gram of a substance by one degree Celsius.

Front

What is the formula for calculating heat energy (q)?

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q = mcΔT, where m is mass, c is specific heat capacity, and ΔT is the change in temperature.

Front

What is thermal equilibrium?

Back

Thermal equilibrium is the state in which two objects in contact do not exchange heat, meaning they are at the same temperature.

Front

What is the difference between heat and temperature?

Back

Heat is the total energy of molecular motion in a substance, while temperature is a measure of the average kinetic energy of the molecules.