One mole of C_2H_5OH_{(l)} was completely bur | vedclass

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

Question

(A) The balanced chemical equation for the combustion of ethanol is: $C_2H_5OH_{(l)} + 3O_{2(g)} \rightarrow 2CO_{2(g)} + 3H_2O_{(l)}$ The standard en

Vedclass · Accepted Answer

$2y + 3z - x$

Vedclass · Answer

(A) The balanced chemical equation for the combustion of ethanol is: $C_2H_5OH_{(l)} + 3O_{2(g)} ightarrow 2CO_{2(g)} + 3H_2O_{(l)}$ The standard enthalpy of reaction $\Delta_rH^{\ominus}$ is calculated using the formula: $\Delta_rH^{\ominus} = \sum \Delta_fH^{\ominus}(	ext{products}) - \sum \Delta_fH^{\ominus}(	ext{reactants})$ Substituting the given values: $\Delta_rH^{\ominus} = [2 	imes \Delta_fH^{\ominus}(CO_{2(g)}) + 3 	imes \Delta_fH^{\ominus}(H_2O_{(l)})] - [\Delta_fH^{\ominus}(C_2H_5OH_{(l)}) + 3 	imes \Delta_fH^{\ominus}(O_{2(g)})]$ Since $\Delta_fH^{\ominus}$ for an element in its standard state $(O_{2(g)})$ is $0$: $\Delta_rH^{\ominus} = [2y + 3z] - [x + 3(0)] = 2y + 3z - x \ kJ \ mol^{-1}$

Similar Questions

Given: $2Fe + \frac{3}{2} O_2 \to Fe_2O_3$,$\Delta H = -193.4 \ kJ$;
$Mg + \frac{1}{2} O_2 \to MgO$,$\Delta H = -140.2 \ kJ$.
What is the $\Delta H$ of the reaction $3Mg + Fe_2O_3 \to 3MgO + 2Fe$ in $kJ$?

When equal volumes of $1 \ M \ HCl$ and $1 \ M \ H_2SO_4$ are separately neutralized by an excess volume of $1 \ M \ NaOH$ solution,$x \ J$ and $y \ J$ of heat are liberated,respectively. The value of $y / x$ is . . . .

The standard enthalpy of combustion of $C$ (graphite),$H_{2(g)}$ and $CH_3OH_{(l)}$ respectively are $-393 \ kJ \ mol^{-1}$,$-286 \ kJ \ mol^{-1}$ and $-726 \ kJ \ mol^{-1}$. What is the standard enthalpy of formation of methanol?

Given that the bond energy of hydrogen-hydrogen bond is $436 \ kJ/mol$,that of hydrogen-oxygen bond is $464 \ kJ/mol$,and those in oxygen molecules $496 \ kJ/mol$,what is the approximate heat of reaction for $2H_2 + O_2 \longrightarrow 2H_2O$ ? .....$kJ/mol$

Hess's law is applicable for the determination of heat of

Vedclass Test Series

Exam Paper Generator

Online Exam Module