The formula for the Joule-Thomson coefficient is ............. .

Which one of the following reactions has $\Delta H = \Delta U$?

Among the following,the number of state variables is $.....$
Internal energy $(U)$; Volume $(V)$; Heat $(q)$; Enthalpy $(H)$

If a chemical reaction is accompanied by the evolution of heat,it is

Point out the wrong statement in relation to enthalpy.

If the work done by $2 \ mol$ of an ideal gas during isothermal reversible expansion from $5 \ L$ to $50 \ L$ is $-189.1 \ L \ atm$,the temperature of the gas (in $^{\circ}C$) is