Work required to refrigeration obtained
Refrigeration obtained to the work required
Lower to higher temperature
Higher to lower temperature
B. Refrigeration obtained to the work required
100
50
205
200
0
1
2
3
1
< 1
> 1
Either (B) or (C), depends on the nature of the gas
Low pressure & high temperature
High pressure & low temperature
Low pressure & low temperature
None of these
Not have a sub-atmospheric vapour pressure at the temperature in the refrigerator coils
Not have unduly high vapour pressure at the condenser temperature
Both (A) and (B)
Have low specific heat
Zero
Negative
Very large compared to that for endothermic reaction
Not possible to predict
Increase
Decrease
Remain same
Increase in summer and will decrease in winter
2
0
1
3
Minimum temperature attainable
Temperature of the heat reservoir to which a Carnot engine rejects all the heat that is taken in
Temperature of the heat reservoir to which a Carnot engine rejects no heat
None of these
0
1
2
3
dE = Tds - PdV
dQ = CvdT + PdV
dQ = CpdT + Vdp
Tds = dE - PdV
Pressure
Temperature
Both (A) & (B)
Neither (A) nor (B)
Always greater than one
Same at the same reduced temperature
Same at the same reduced pressure
Both (B) & (C)
300 × (32/7)
300 × (33/5)
300 × (333/7)
300 × (35/7)
Any
A perfect
An easily liquefiable
A real
More than
Less than
Equal to
Not related to
Departure from ideal solution behaviour
Departure of gas phase from ideal gas law
Vapour pressure of liquid
None of these
Less than
Equal to
More than
Either (B) or (C); depends on the type of alloy
Below
At
Above
Either 'b' or 'c'
Is the analog of linear frictionless motion in machines
Is an idealised visualisation of behaviour of a system
Yields the maximum amount of work
Yields an amount of work less than that of a reversible process
100,000 kW
160,000 kW
200,000 kW
320,000 kW
Sub-cooled
Saturated
Non-solidifiable
None of these
1
2
3
4
The values of (∂P/∂V)T and (∂2P/∂V2)T are zero for a real gas at its critical point
Heat transferred is equal to the change in the enthalpy of the system, for a constant pressure, non-flow, mechanically reversible process
Thermal efficiency of a Carnot engine depends upon the properties of the working fluid besides the source & sink temperatures
During a reversible adiabatic process, the entropy of a substance remains constant
ΔF = ΔH + T [∂(ΔF)/∂T]P
ΔF = ΔH - TΔT
d(E - TS) T, V < 0
dP/dT = ΔHvap/T.ΔVvap
Slower than Y
Faster than Y
Three times slower than Y
Three times faster than Y
Increase
Decrease
Remain unchanged
First fall and then rise
Compression ratio of an Otto engine is comparatively higher than a diesel engine
Efficiency of an Otto engine is higher than that of a diesel engine for the same compression ratio
Otto engine efficiency decreases with the rise in compression ratio, due to decrease in work produced per quantity of heat
Diesel engine normally operates at lower compression ratio than an Otto engine for an equal output of work
Volume
Pressure
Temperature
All (A), (B) and (C)
J/s
J.S
J/kmol
kmol/J