The value of enthalpy change $$(\Delta H)$$ for the reaction $$\mathrm{C}_2 \mathrm{H}_5 \mathrm{OH}(l)+3 \mathrm{O}_2(\mathrm{~g}) \longrightarrow 2 \mathrm{CO}_2(\mathrm{~g})+ 3 \mathrm{H}_2 \mathrm{O}(l)$$, at $$27^{\circ} \mathrm{C}$$ is $$-1366 \cdot 5 \mathrm{~kJ} \mathrm{~mol}^{-1}$$. The value of internal energy change for the above reaction at this temperature will be
The volume-temperature graphs of a given mass of an ideal gas at constant pressures are shown below. What is the correct order of pressures?
In acetylene molecule between the carbon atoms there are
If the ionic product of $$\mathrm{Ni}(\mathrm{OH})_2$$ is $$1.9 \times 10^{-15}$$, then the molar solubility of $$\mathrm{Ni}(\mathrm{OH})_2$$ in $$1.0 \mathrm{~M} \mathrm{~NaOH}$$ is