Thermochemistry Quiz

What does Thermochemistry primarily focus on?

• Energy changes

• Color changes

• Mass changes

• Volume changes

Which system type is considered ideal for not allowing any exchange of matter or energy?

• Open system

• Closed system

• Isolated system

• Chemical system

Which system type is represented by a bottle with a stopper, allowing only heat exchange?

• Open

• Closed

• Isolated

• Semi-closed

What type of system is depicted by a bottle without a stopper, allowing both heat and vapor exchange?

• Open

• Closed

• Isolated

• Semi-closed

What is the primary focus of the 1st Law of Thermodynamics?

• Heat transfer

• Energy conservation

• Temperature change

• Pressure variation

During an endothermic change, what happens to the temperature of the surroundings?

• It decreases.

• It increases.

• It remains constant.

• It fluctuates.

What is the sign of ΔH in an exothermic reaction?

• ΔH > 0

• ΔH < 0

• ΔH = 0

• ΔH ≠ 0

The following reaction represents:
CaCO₃​_(s) + 178 kJ → CaO_(s) + CO_2​(g)

• Endothermic

• Exothermic

What happens to the internal energy of a system when work is done on it?

• It remains constant.

• It fluctuates.

• It decreases.

• It increases.

Which law of thermodynamics states that energy cannot be created or destroyed?

• 0th Law

• 2nd Law

• 3rd Law

• 1st Law