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

Prove the relationship between $C_p$ and $C_v$ for an ideal gas.

An ideal gas is expanded from $1 \times 10^{-3} \,m^3$ to $1 \times 10^{-2} \,m^3$ against a constant external pressure of $1 \times 10^5 \,N/m^2$ at $300 \,K$. The work done is

Among the quantities,density $(\rho)$,temperature $(T)$,enthalpy $(H)$,heat capacity $(C_p)$,volume $(V)$ and pressure $(p)$,a set of intensive variables are

Explain: $\Delta H = q_{p}$

An exothermic reaction is one which