"Heat cannot itself flow from a body at lower temperature to a body at higher temperature" is a statement or consequence of

Which is an intensive property ?

Which of the following parameters does not characterize the thermodynamic state of matter ?

An ideal gas is compressed adiabatically to ⁸/27 times of its present value at 27^oC. The temperature of the gas becomes (γ= 5/3).

A thermodynamic system is taken through the cycle PQRSP process. The net work done by the system is 

                  

One mole of a mono atomic gas is heated at a constant pressure of 1 atmosphere from 0 K to 100 K. If the gas constant R = 8.32J/mol K, the change in internal energy of the gas is approximately.

Even Carnot engine cannot give 100% efficiency, because we cannot

A scientist says that the efficiency of his heat engine which works at source temperature of 127^oC and sink temperature 27^oC is 26%.

The temperature of source and sink of a heat engine are 127^oC and 27^oC respectively. An inventor claims its efficiency to be 26%, then

When a system is taken from the initial state i to final state f along he path iaf, it is found that Q = 50 cal and W = 20 cal. If along the path ibf, Q = 36 cal, then W along the path ibf is