56. Which of the following is the formula for calculating the amount of heat required to change the phase of a substance?
A) q = cmΔT
B) q = mcΔT
C) q = mL
D) q = mH
57. Which of the following is a measure of the disorder or randomness of a system?
A) Temperature
B) Heat
C) Entropy
D) Enthalpy
58. Which of the following is the formula for calculating the efficiency of a heat engine?
A) efficiency = (work output)/(heat input)
B) efficiency = (heat output)/(heat input)
C) efficiency = (heat input)/(work output)
D) efficiency = (heat input)/(heat output)
59. Which of the following statements is true about the triple point of a substance?
A) The triple point is the temperature at which a substance melts
B) The triple point is the temperature at which a substance boils
C) The triple point is the temperature at which a substance can exist in all three phases
D) The triple point is the temperature at which a substance can only exist in the solid phase
