A reversible engine converts one-sixth of the heat input into work. When the temperature of the sink is reduced by 62oC, the efficiency of the engine is doubled. The temperatures of the source and sink are:
The internal energy of an ideal gas depends on:
Heat added to a system is equal to:
In the condensation of a gas the mean KE (K) and potential energy (U) of molecules change;
When 110 J of heat is added to a gaseous system, internal energy increases by 40 J; the amount of work done is:
A gas has:
Mean kinetic energy per gram molecule for diatomic gas is:
Molar specific heat at constant volume Cv for a mono-atomic gas is:
Cp >Cv, as in the case of Cp:
The following sets of values for Cv and Cp of a gas have been reported by different students. The units are cal/gm-mole-K. Which of these sets is most reliable?
We consider a thermodynamic system. If represents the increase in its internal energy and W the work done by the system, which of the following statements is true?