Which among the following is $\text{NOT}$ an extensive property?

Two moles of an ideal gas expand spontaneously into a vacuum. The work done is ............. $Joule$.

For which of the following reactions,$\Delta H$ is equal to $\Delta U$ ?

Which of the following symbols represents the heat of reaction at constant volume?

For the reaction,$2Cl_{(g)} \to Cl_{2_{(g)}}$,what are the signs of $\Delta H$ and $\Delta S$?

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