Any series of operations so carried out that at the end,the system is back to its initial state is called:

When $2$ moles of an ideal gas are expanded isothermally from a volume of $12.5 \ L$ to $15.0 \ L$ against a constant external pressure of $760 \ mm \ Hg$,calculate the amount of work done in joules. (in $J$)

Which of the following processes exhibits $\Delta U = 0$?

An isolated system can exchange ........ with the surroundings.

Which law of thermodynamics can be considered as the definition of temperature?

Which of the following statements is true?