The heat of combustion of ethene (C_2H_4) is | vedclass

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

Question

(B) The combustion reaction for ethene is: $C_2H_4(g) + 3O_2(g) \rightarrow 2CO_2(g) + 2H_2O(l)$; $\Delta H = -1411 \, kJ \, mol^{-1}$.From the stoich

Vedclass · Accepted Answer

$296.5 \, L$

Vedclass · Answer

(B) The combustion reaction for ethene is: $C_2H_4(g) + 3O_2(g) ightarrow 2CO_2(g) + 2H_2O(l)$; $\Delta H = -1411 \, kJ \, mol^{-1}$.From the stoichiometry,$1 \, mol$ of $C_2H_4$ requires $3 \, mol$ of $O_2$ for combustion,releasing $1411 \, kJ$ of heat.To produce $6226 \, kJ$ of heat,the number of moles of $C_2H_4$ burned is $n = \frac{6226}{1411} \approx 4.4125 \, mol$.The moles of $O_2$ required = $3 	imes n = 3 	imes 4.4125 = 13.2375 \, mol$.At $S.T.P.$,the volume of $1 \, mol$ of gas is $22.4 \, L$.Volume of $O_2 = 13.2375 	imes 22.4 \approx 296.5 \, L$.

The heat of combustion of ethene $(C_2H_4)$ is $1411 \, kJ$. If a certain amount of ethene is burned to produce $6226 \, kJ$ of heat,what is the volume of $O_2$ (at $S.T.P.$) consumed in the process?

Similar Questions

The concentrated sulphuric acid that is peddled commercially is $95\%\, H_2SO_4$ by weight. If the density of this commercial acid is $1.834\, g\, cm^{-3},$ the molarity of this solution is ........... $M$.

What is the weight of oxygen required for the complete combustion of $2.8 \, kg$ of ethylene? (in $kg$)

$24 \ g$ of $Mg$ metal reacts with water. How many moles of $H_2$ will be liberated? ............. $mol$

The mass percentage composition of dry air at sea level is approximately $N_2: 63 \%$, $O_2: 16 \%$, $Kr: 21 \%$. If the total pressure is $p \ atm$, calculate the partial pressure of each component respectively. (Molecular weights: $N_2 = 28, O_2 = 32, Kr = 84$)

What will be the normality of a solution containing $4.9 \ g$ of $H_3PO_4$ dissolved in $500 \ mL$ water (in $N$)?

Vedclass Test Series

Exam Paper Generator

Online Exam Module