51. Heat of vaporization is the heat required to:
A) Freeze a liquid
B) Convert liquid to gas
C) Melt solid
D) Cool gas
Answer: B
52. Heat of fusion is the heat required to:
A) Convert gas to liquid
B) Convert solid to liquid
C) Convert liquid to gas
D) Convert gas to solid
Answer: B
53. ΔH for freezing is:
A) Positive
B) Negative
C) Zero
D) Infinite
Answer: B
54. ΔH for melting is:
A) Negative
B) Positive
C) Zero
D) Undefined
Answer: B
55. The enthalpy change of reaction depends on:
A) Path
B) Initial and final states
C) Time
D) Catalyst
Answer: B
56. Calorimetry is the measurement of:
A) Mass
B) Heat changes
C) Pressure
D) Volume
Answer: B
57. A bomb calorimeter is used for:
A) Gas reactions
B) Combustion reactions
C) Neutralization
D) Dilution
Answer: B
58. In calorimetry, heat lost equals:
A) Heat gained
B) Zero
C) Work done
D) Pressure
Answer: A
59. Heat of solution is:
A) Heat change when solute dissolves
B) Heat at boiling
C) Heat at melting
D) Heat at freezing
Answer: A
60. Heat of hydration involves:
A) Water formation
B) Solvation of ions
C) Gas formation
D) Solid formation
Answer: B