On the basis of the following reactions,which | vedclass

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

Question

(C) According to Hess's Law of Constant Heat Summation,the total enthalpy change of a reaction is the same whether it occurs in one step or several st

Vedclass · Accepted Answer

$x = y + z$

Vedclass · Answer

(C) According to Hess's Law of Constant Heat Summation,the total enthalpy change of a reaction is the same whether it occurs in one step or several steps.Given reactions:$(1) \ C_{(gr)} + O_{2_{(g)}} 	o CO_{2_{(g)}}, \Delta H = x \ kJ/mol$$(2) \ C_{(gr)} + \frac{1}{2} O_{2_{(g)}} 	o CO_{(g)}, \Delta H = y \ kJ/mol$$(3) \ CO_{(g)} + \frac{1}{2} O_{2_{(g)}} 	o CO_{2_{(g)}}, \Delta H = z \ kJ/mol$If we add reaction $(2)$ and reaction $(3)$:$(C_{(gr)} + \frac{1}{2} O_{2_{(g)}}) + (CO_{(g)} + \frac{1}{2} O_{2_{(g)}}) 	o CO_{(g)} + CO_{2_{(g)}}$Canceling $CO_{(g)}$ from both sides and combining $\frac{1}{2} O_{2_{(g)}}$ terms:$C_{(gr)} + O_{2_{(g)}} 	o CO_{2_{(g)}}$This is identical to reaction $(1)$.Therefore,the enthalpy change for reaction $(1)$ is the sum of the enthalpy changes of reactions $(2)$ and $(3)$:$x = y + z$

On the basis of the following reactions,which one is correct?
$C_{(gr)} + O_{2_{(g)}} \to CO_{2_{(g)}}, \Delta H = x \ kJ/mol$
$C_{(gr)} + \frac{1}{2} O_{2_{(g)}} \to CO_{(g)}, \Delta H = y \ kJ/mol$
$CO_{(g)} + \frac{1}{2} O_{2_{(g)}} \to CO_{2_{(g)}}, \Delta H = z \ kJ/mol$

Similar Questions

State Hess's Law of Constant Heat Summation.

Equal volumes of methanoic acid and sodium hydroxide are mixed. If $x$ is the heat of formation of water,then the heat evolved on neutralization is

When $50 \ cm^3$ of a strong acid is added to $50 \ cm^3$ of an alkali,the temperature rises by $5 \ ^oC$. If $250 \ cm^3$ of each liquid are mixed,the temperature rise would be $... \ ^oC$.

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

$S_{(g)} + \frac{3}{2} O_{2(g)} \rightarrow SO_{3(g)} + 2x \ kcal$
$SO_{2(g)} + \frac{1}{2} O_{2(g)} \rightarrow SO_{3(g)} + y \ kcal$
The heat of formation of $SO_{2(g)}$ is given by :

Vedclass Test Series

Exam Paper Generator

Online Exam Module

On the basis of the following reactions,which one is correct?$C_{(gr)} + O_{2_{(g)}} \to CO_{2_{(g)}}, \Delta H = x \ kJ/mol$$C_{(gr)} + \frac{1}{2} O_{2_{(g)}} \to CO_{(g)}, \Delta H = y \ kJ/mol$$CO_{(g)} + \frac{1}{2} O_{2_{(g)}} \to CO_{2_{(g)}}, \Delta H = z \ kJ/mol$