A,B,C and D are some compounds. The enthalpy | vedclass

Name: Exam Paper Generator | JEE NEET Paper Generator | Vedclass
Brand: Vedclass
Rating: 5 (35 reviews)

Question

(A) Given:$\Delta H_f(A) = 9.7 \ kJ \ mol^{-1}$$\Delta H_f(B) = -110 \ kJ \ mol^{-1}$$\Delta H_f(C) = 81 \ kJ \ mol^{-1}$$\Delta H_f(D) = -393 \ kJ \

Vedclass · Accepted Answer

$-777.7$

Vedclass · Answer

(A) Given:$\Delta H_f(A) = 9.7 \ kJ \ mol^{-1}$$\Delta H_f(B) = -110 \ kJ \ mol^{-1}$$\Delta H_f(C) = 81 \ kJ \ mol^{-1}$$\Delta H_f(D) = -393 \ kJ \ mol^{-1}$Reaction: $A_{(g)} + 3B_{(g)} \longrightarrow C_{(g)} + 3D_{(g)}$$\Delta_r H = \sum \Delta H_f(	ext{products}) - \sum \Delta H_f(	ext{reactants})$$\Delta_r H = [\Delta H_f(C) + 3 	imes \Delta H_f(D)] - [\Delta H_f(A) + 3 	imes \Delta H_f(B)]$$\Delta_r H = [81 + 3 	imes (-393)] - [9.7 + 3 	imes (-110)]$$\Delta_r H = [81 - 1179] - [9.7 - 330]$$\Delta_r H = -1098 - (-320.3)$$\Delta_r H = -1098 + 320.3$$\Delta_r H = -777.7 \ kJ \ mol^{-1}$

$A$,$B$,$C$ and $D$ are some compounds. The enthalpy of formation of $A_{(g)}$,$B_{(g)}$,$C_{(g)}$ and $D_{(g)}$ is $9.7, -110, 81$ and $-393 \ kJ \ mol^{-1}$ respectively. What is $\Delta_r H$ (in $kJ \ mol^{-1}$) for the given reaction?
$A_{(g)} + 3B_{(g)} \longrightarrow C_{(g)} + 3D_{(g)}$

Similar Questions

In which of the following neutralisation reactions,the heat of neutralisation will be highest?

Explain Enthalpy of Solution $\Delta_{sol}H^{\theta}$.

Enthalpies of formation of $CO_{(g)}$,$CO_{2(g)}$,$N_2O_{(g)}$ and $N_2O_{4(g)}$ are $-110$,$-393$,$81$ and $9.7 \, kJ \, mol^{-1}$ respectively. Find the value of $\Delta_r H$ for the reaction:
$N_2O_{4(g)} + 3 CO_{(g)} \rightarrow N_2O_{(g)} + 3 CO_{2(g)}$

If the enthalpy of combustion of carbon to $CO_{2(g)}$ is $-394.0 \ kJ \ mol^{-1}$,the enthalpy change for the formation of $17.6 \ g$ of $CO_2$ from carbon and dioxygen at the same temperature in $kJ$ is:

If $C + O_2 \to CO_2 + 94.2 \ kcal$,$H_2 + \frac{1}{2} O_2 \to H_2O + 68.3 \ kcal$,and $CH_4 + 2O_2 \to CO_2 + 2H_2O + 210.8 \ kcal$,then the heat of formation of methane will be $... \ kcal$.

Vedclass Test Series

Exam Paper Generator

Online Exam Module

$A$,$B$,$C$ and $D$ are some compounds. The enthalpy of formation of $A_{(g)}$,$B_{(g)}$,$C_{(g)}$ and $D_{(g)}$ is $9.7, -110, 81$ and $-393 \ kJ \ mol^{-1}$ respectively. What is $\Delta_r H$ (in $kJ \ mol^{-1}$) for the given reaction?$A_{(g)} + 3B_{(g)} \longrightarrow C_{(g)} + 3D_{(g)}$