Physics
Thermodynamic
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#25 For an ideal gas, Cp - Cv equals
A) 0
B) R
C) 2R
D) R/2
Answer: B
#26 Ratio ? = Cp/Cv for ideal monoatomic gas is approximately
A) 1.33
B) 1.40
C) 1.67
D) 1.00
Answer: C
#27 Work done in a PV diagram equals
A) area under T–V curve
B) area under P–V curve
C) slope of P–V
D) area under P–T curve
Answer: B
#28 State variables are
A) Q and W
B) P, V, T, U
C) Q only
D) W only
Answer: B
#29 Heat and work are
A) path functions
B) state functions
C) constants
D) intensive properties
Answer: A
#30 Mechanical equivalent of heat J is numerically about
A) 1.00 J/cal
B) 4.186 J/cal
C) 0.239 J/cal
D) 10.0 J/cal
Answer: B
#31 Heat required to raise temperature of mass m by ?T is
A) Q = m?T/c
B) Q = mc?T
C) Q = c/?T
D) Q = m/?T
Answer: B
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