Thermochemistry

The branch of chemistry which deals with the study of heat exchange, entropy, enthalpy of a chemical reaction is called

Distribution of fraction of molecules with velocity is represented in the figure.

Velocity corresponding to point $\mathrm{X}$ is

What does thermochemistry deals with?

$1$ mole of a gas at $1$ bar and $300 \mathrm{K}$ are compressed at constant temperature by use of a constant pressure of $5$ bar. How much work is done on the gas ?

The heat evolved in the following reaction $2{\mathrm{H}}_2\left(\mathrm{g}\right)+{\mathrm{O}}_2\left(\mathrm{g}\right)⟶2{\mathrm{H}}_2\mathrm{O}\left(\mathrm{l}\right),\mathrm{\Delta H}=-484 \mathrm{kJ}$ to produce $9 \mathrm{g}$ of water is

Cotyledons are also called-

Standard enthalpies of formation of ${\mathrm{O}}_3,\mathrm{C}{\mathrm{O}}_2,\mathrm{N}{\mathrm{H}}_3$ and $\mathrm{HI}$ are $+142.2 {\mathrm{kJmol}}^{-1},-393.2 {\mathrm{kJmol}}^{-1},-46.2 {\mathrm{kJmol}}^{-1} \text{and} +25.9 \mathrm{k}\mathrm{J}\mathrm{m}\mathrm{o}{\mathrm{l}}^{-1}$ respectively. The order of their increasing stability will be

How many grams of ice at ${\mathrm{0 }\mathrm{}}^{\mathrm{o}}\mathrm{C}$ can be melted by the addition of 500 J of heat? (The molar heat of fusion for ice is $\mathrm{6.02 }\mathrm{k}\mathrm{J}\mathrm{m}\mathrm{o}{\mathrm{l}}^{-1}$ )