81. The SI unit of heat capacity is:
A) J/K
B) J/mol
C) K/J
D) mol/J
Answer: A
82. If ΔH is negative, the reaction is:
A) Endothermic
B) Exothermic
C) Neutral
D) Slow
Answer: B
83. If ΔH is positive, the reaction is:
A) Exothermic
B) Endothermic
C) Neutral
D) Fast
Answer: B
84. The total energy of a system is called:
A) Enthalpy
B) Internal energy
C) Heat
D) Work
Answer: B
85. Heat of reaction is usually measured in:
A) kJ/mol
B) mol
C) kg
D) atm
Answer: A
86. Increasing mass increases:
A) Specific heat
B) Heat required
C) Temperature
D) Pressure
Answer: B
87. The relation between ΔH and ΔE is:
A) ΔH = ΔE + PΔV
B) ΔH = ΔE
C) ΔH = PΔV
D) ΔH = TΔS
Answer: A
88. Heat of dilution refers to:
A) Adding solvent
B) Adding solute
C) Removing solvent
D) Cooling solution
Answer: A
89. Calorimeter constant accounts for:
A) Heat absorbed by calorimeter
B) Heat of reaction
C) Pressure
D) Volume
Answer: A
90. Heat always flows from:
A) Cold to hot
B) Hot to cold
C) High pressure to low
D) Low pressure to high
Answer: B