Related Questions

When gas is heated at constant pressure, the heat supplied is utilized in
A Increasing the internal energy of gas
B Doing some external work
C Increasing the internal energy of gas and also for doing some external work
D None of the above
When the gas is heated at constant pressure, the heat supplied
A Increases the internal energy of the gas
B Increases the temperature of the gas
C Does some external work during expansion
D Both (B) and (C)
The cycle in which heat is supplied at constant volume and rejected at constant pressure is known as
A Dual combustion cycle
B Diesel cycle
C Atkinson cycle
D Rankine cycle
According to Regnault's law, the specific heat at constant pressure (cp) and specific heat at constant volume (cv) _________ with the change in pressure and temperature of the gas.
A Change
B Do not change
C Both (A) and (B)
D None of these
Air is to be heated by condensing steam. Two heat exchangers are available (i) a shell and tube heat exchanger and (ii) a finned tube heat exchanger. Tube side heat transfer area are equal in both the cases. The recommended arrangement is
A Finned tube heat exchanger with air inside and steam outside
B Finned tube heat exchanger with air outside and steam inside
C Shell and tube heat exchanger with air inside tubes and steam on shell side
D Shell and tube heat exchanger with air on shell side and steam inside tubes
In reactions involving solids and liquids (where change in volume is negligible), the heat of reaction at constant pressure as compared to that at constant volume is
A More
B Less
C Same
D Unpredictable; depends on the particular reaction
A process, in which the gas is heated or expanded in such a way that the product of its pressure and volume remains constant , is called
A isothermal process
B adiabatic process
C hyperbolic process
D polytropic process
If a gas is heated against a pressure, keeping the volume constant, then work done will be equal to
A +ve
B -ve
C Zero
D Anywhere between zero and infinity
A process, in which the gas is heated or expanded in such a way that the product of its pressure and volume remains constant, is called
A Isothermal process
B Hyperbolic process
C Adiabatic process
D Polytropic process
When a gas is heated at constant volume
A Its temperature will increase
B Its pressure will increase
C Both temperature and pressure will increase
D Neither temperature nor pressure will increase

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