Thermochemistry Review

Which term describes the total amount of energy stored in a substance due to the motion of its particles?

• Enthalpy

• Thermal energy

• Entropy

• Specific heat

• The reaction is nonspontaneous

• The reaction is spontaneous

• The reaction is at equilibrium

• The reaction is endothermic

• endothermic reaction

• exothermic reaction

The __________ law of thermodynamics states that entropy is always increasing. 

• first
• second
• third
• zeroth

Temperature is a measure of average _________ energy of individual atoms.

• heat

• potential

• mechanical

• kinetic

Which of the following best defines entropy?

• The amount of heat required to raise the temperature of 1 gram of a substance by 1°C

• The measure of disorder or randomness in a system

• The total energy of a system

• The energy required to break a chemical bond

Which of the following best describes a spontaneous reaction?

• A reaction that requires continuous energy input

• A reaction that occurs without outside intervention

• A reaction that never occurs

• A reaction that is always exothermic

Which of the following is a measure of the heat content of a system at constant pressure?

• Entropy

• Enthalpy

• Specific heat

• Temperature