First law of thermodynamics applied to a non-stationary system can be given as:
Q+W = del(KE)+del(PE)+del(U)
If no work in done on the system then(W=0)
Q= del(KE)+del(PE)+del(U)
i.e. heat transfer into the system can change the kinetic energy of the system too.If the KE changes then there should be acceleration which means work is done on the system. How is this possible when work is taken to be zero?. Please help.
