Embibe Experts Solutions for Exercise 3: Assignment

Enthalpy of formation of ${\mathrm{NH}}_3$ is $-\mathrm{XkJ}$ and ${\mathrm{\Delta H}}_{\mathrm{H}-\mathrm{H}}$, ${\mathrm{\Delta H}}_{\mathrm{N}-\mathrm{H}}$ are respectively ${\mathrm{YkJmol}}^{-1}$ and ${\mathrm{ZkJmol}}^{-1}$. The value of ${\mathrm{\Delta H}}_{\mathrm{N}=\mathrm{N}}$ is

The heat of neutralisation for strong acid and strong base forming $2$moles of water is

The value of $\mathrm{\Delta H}°$ in $\mathrm{kJ}$ for the reaction will be ${\mathrm{CS}}_2\left(\mathrm{I}\right)+4\mathrm{NOCl}\left(\mathrm{g}\right)\to {\mathrm{CCl}}_4\left(\mathrm{I}\right)+2{\mathrm{SO}}_2\left(\mathrm{g}\right)+2{ \mathrm{N}}_2\left(\mathrm{g}\right)$ if
${\mathrm{\Delta H}}_{\mathrm{f}}°\left({\mathrm{CS}}_2\right)=-\mathrm{x} {\mathrm{\Delta H}}_{\mathrm{f}}°\left(\mathrm{NOCl}\right)=-\mathrm{y}$
${\mathrm{\Delta H}}_{\mathrm{f}}°\left({\mathrm{CCl}}_4\right)=+\mathrm{z}$
${\mathrm{\Delta H}}_{\mathrm{f}}°\left({\mathrm{SO}}_2\right)=-\mathrm{r}$

The heat liberated on complete combustion of $1$ mole of ${\mathrm{CH}}_4$ gas to ${\mathrm{CO}}_2\left(\mathrm{g}\right)$ and ${\mathrm{H}}_2\mathrm{O}\left(\mathrm{I}\right)$ is $890 \mathrm{kJ}$. Calculate the heat evolved by $2.4 \mathrm{L}$of ${\mathrm{CH}}_4$ on complete combustion.

The work done in an open vessel at $300 \mathrm{K}$, when $112 \mathrm{g}$ iron reacts with dil $\mathrm{HCl}$ to give ${\mathrm{FeCl}}_2$, is nearly

A schematic representation of enthalpy changes for The reaction, ${\mathrm{C}}_{(\mathrm{graphite}) }+\frac{1}{2}{\mathrm{O}}_2\left(\mathrm{g}\right)\to \mathrm{CO}\left(\mathrm{g}\right)$ is given below. The missing value is

Which of the following equations respresents standard heat of formation of ${\mathrm{CH}}_4$

Calorific value of ethane, in $\mathrm{kJ}/\mathrm{g}$ if for the reaction $2{\mathrm{C}}_2{\mathrm{H}}_6+7{\mathrm{O}}_2\to 4{\mathrm{CO}}_2+6{\mathrm{H}}_2\mathrm{O};\Delta \mathrm{H}=-745.6\mathrm{kcal}$