(B) The decomposition reaction is: $CaCO_{3(s)} \rightarrow CaO_{(s)} + CO_{2(g)}$$\Delta H_{r}^{\circ} = [\Delta_{f} H^{\circ}(CaO) + \Delta_{f} H^{\

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(B) The decomposition reaction is: $CaCO_{3(s)} \rightarrow CaO_{(s)} + CO_{2(g)}$$\Delta H_{r}^{\circ} = [\Delta_{f} H^{\circ}(CaO) + \Delta_{f} H^{\circ}(CO_2)] - [\Delta_{f} H^{\circ}(CaCO_3)]$$\Delta H_{r}^{\circ} = [(-634) + (-393)] - (-1210)$$\Delta H_{r}^{\circ} = -1027 + 1210 = +183 \ kJ \ mol^{-1}$

Class 11 Chemistry Thermodynamics Heat of reaction, Bond energy and Hess law

Medium

The standard enthalpy of formation of $CO_{2(g)}$,$CaO_{(s)}$ and $CaCO_{3(s)}$ are $-393, -634, -1210 \ kJ \ mol^{-1}$ respectively. If all the substances are in standard state,the standard enthalpy of decomposition of calcium carbonate to $CaO_{(s)}$ and $CO_{2(g)}$ (in $kJ \ mol^{-1}$) is

AP EAMCET 2023 All AP EAMCET

A
$969$
B
$183$
C
$-969$
D
$-183$

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Class 11

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Thermodynamics

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Heat of reaction, Bond energy and Hess law

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Given $C + O_2 \rightarrow CO_2 + 94.2 \ kcal$,$\Delta H = -94.2 \ kcal$; $H_2 + 1/2 O_2 \rightarrow H_2O + 68.3 \ kcal$,$\Delta H = -68.3 \ kcal$ and $CH_4 + 2O_2 \rightarrow CO_2 + 2H_2O + 210.8 \ kcal$,$\Delta H = -210.8 \ kcal$. Calculate the heat of formation of methane $(CH_4)$ in $kcal$.

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If the standard molar enthalpy change for combustion of graphite powder is $-2.48 \times 10^{2} \ kJ \ mol^{-1}$,the amount of heat generated on combustion of $1 \ g$ of graphite powder is $..... \ kJ$.
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The standard enthalpy of formation of $CO_{2(g)}$,$CaO_{(s)}$ and $CaCO_{3(s)}$ are $-393, -634, -1210 \ kJ \ mol^{-1}$ respectively. If all the substances are in standard state,the standard enthalpy of decomposition of calcium carbonate to $CaO_{(s)}$ and $CO_{2(g)}$ (in $kJ \ mol^{-1}$) is

Similar Questions

Given $C + O_2 \rightarrow CO_2 + 94.2 \ kcal$,$\Delta H = -94.2 \ kcal$; $H_2 + 1/2 O_2 \rightarrow H_2O + 68.3 \ kcal$,$\Delta H = -68.3 \ kcal$ and $CH_4 + 2O_2 \rightarrow CO_2 + 2H_2O + 210.8 \ kcal$,$\Delta H = -210.8 \ kcal$. Calculate the heat of formation of methane $(CH_4)$ in $kcal$.

The value of heat generated when $36.5 \, g$ of $HCl$ and $40 \, g$ of $NaOH$ react during neutralization is.....$kcal$.

The total enthalpies of reactants and products are $H_R$ and $H_P$ respectively. For an exothermic reaction,which of the following is true?

If the standard molar enthalpy change for combustion of graphite powder is $-2.48 \times 10^{2} \ kJ \ mol^{-1}$,the amount of heat generated on combustion of $1 \ g$ of graphite powder is $..... \ kJ$.(Nearest integer)

The bond dissociation energy of molecules is.......

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If the standard molar enthalpy change for combustion of graphite powder is $-2.48 \times 10^{2} \ kJ \ mol^{-1}$,the amount of heat generated on combustion of $1 \ g$ of graphite powder is $..... \ kJ$.
(Nearest integer)