If S + O_2 to SO_2; (Delta H = -298.2 kJ),SO | vedclass

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

Question

(D) The formation reaction of $H_2SO_4$ is: $H_2 + S + 2O_2 	o H_2SO_4$.To obtain this,we add the given equations:$(1) S + O_2 	o SO_2; \Delta H_1 =

Vedclass · Accepted Answer

$-813.9$

Vedclass · Answer

(D) The formation reaction of $H_2SO_4$ is: $H_2 + S + 2O_2 	o H_2SO_4$.To obtain this,we add the given equations:$(1) S + O_2 	o SO_2; \Delta H_1 = -298.2 \ kJ$$(2) SO_2 + \frac{1}{2} O_2 	o SO_3; \Delta H_2 = -98.2 \ kJ$$(3) SO_3 + H_2O 	o H_2SO_4; \Delta H_3 = -130.2 \ kJ$$(4) H_2 + \frac{1}{2} O_2 	o H_2O; \Delta H_4 = -287.3 \ kJ$Adding $(1) + (2) + (3) + (4)$:$S + O_2 + SO_2 + \frac{1}{2} O_2 + SO_3 + H_2O + H_2 + \frac{1}{2} O_2 	o SO_2 + SO_3 + H_2SO_4 + H_2O$Canceling common terms on both sides gives:$H_2 + S + 2O_2 	o H_2SO_4$$\Delta H_f = \Delta H_1 + \Delta H_2 + \Delta H_3 + \Delta H_4$$\Delta H_f = (-298.2) + (-98.2) + (-130.2) + (-287.3) = -813.9 \ kJ$.

If $S + O_2 \to SO_2; (\Delta H = -298.2 \ kJ)$,$SO_2 + \frac{1}{2} O_2 \to SO_3; (\Delta H = -98.2 \ kJ)$,$SO_3 + H_2O \to H_2SO_4; (\Delta H = -130.2 \ kJ)$,$H_2 + \frac{1}{2} O_2 \to H_2O; (\Delta H = -287.3 \ kJ)$,then the enthalpy of formation of $H_2SO_4$ at $298 \ K$ will be......$kJ$.

Similar Questions

$A_2 + B_2 \rightarrow 2AB$; $\Delta H_{r}^0 = -400\,kJ\,mol^{-1}$. $AB$,$A_2$ and $B_2$ are diatomic molecules. If the bond enthalpies of $A_2$,$B_2$ and $AB$ are in the ratio $1:0.5:1$,then the bond enthalpy of $A_2$ is $......\,kJ\,mol^{-1}$ (Nearest integer).

If the value of $\Delta H_{O-H}$ is $109 \ kcal \ mol^{-1}$,then the formation of one mole of water from $H_{(g)}$ and $O_{(g)}$ is associated with:

The enthalpy of neutralisation of $NH_4OH$ and $HCl$ is numerically:

For the reaction $2H_{2(g)} + O_{2(g)} \to 2H_2O_{(l)}$,the enthalpy change is $\Delta H = -571 \ kJ$. If the $H-H$ bond energy is $435 \ kJ \ mol^{-1}$ and the $O=O$ bond energy is $498 \ kJ \ mol^{-1}$,calculate the average bond energy of the $O-H$ bond in $kJ \ mol^{-1}$.

What is bond enthalpy? Explain bond enthalpy in polyatomic molecules like $H_2O$.

Vedclass Test Series

Exam Paper Generator

Online Exam Module