Thermochemistry Review

Front

What state of matter is water at 700 mmHg and 50 °C?

Back

Liquid

Front

What type of equation is represented by H2 + ½ O2 --> H2O + 285kJ?

Back

Thermochemical equation

Front

What is the term for energy transferred between samples of matter due to temperature difference?

Back

Heat

Front

If ΔH is positive, where is heat shown in a thermochemical equation?

Back

Reactant side

Front

What is the boiling point of a substance that boils at 60 °C?

Back

60 °C

Front

What is the definition of thermochemistry?

Back

The study of heat changes that accompany chemical reactions.

Front

What is the difference between exothermic and endothermic reactions?

Back

Exothermic reactions release heat; endothermic reactions absorb heat.

Front

What does ΔH represent in a thermochemical equation?

Back

The change in enthalpy.

Front

What is the standard state of a substance?

Back

The physical state of a substance under standard conditions (1 atm, 25 °C).

Front

What is the significance of the enthalpy of formation?

Back

It is the heat change when one mole of a compound is formed from its elements in their standard states.