Among the following,the set of parameters that represents path functions is:
$(a) \ q + w$
$(b) \ q$
$(c) \ w$
$(d) \ H - TS$

If the enthalpy of $B$ is greater than that of $A$,the reaction $A \to B$ is

For a chemical reaction,when does $\Delta H = \Delta U$ occur?

Assertion : During an adiabatic process,heat energy is not exchanged between the system and its surroundings.
Reason : The temperature of a gas increases when it undergoes an adiabatic expansion.

The internal energy of an ideal gas increases during an isothermal process when the gas is

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 $J$)