Ask Questions, Get Answers

Want to ask us a question? Click here
Browse Questions
0 votes

For complete combustion of ethanol $C_2H_5OH(l)+3O_2(g)\rightarrow 2CO_2(g)+3H_2O(l)$ the amount of heat produced as measured in bomb calorimeter,is 1$364.47\; kJ mol^{–1}$ at $25^{\large\circ}C$.Assuming ideality the Enthalpy of combustion,$\Delta_eH$,for the reaction will be: $(R = 8.314 kJ mol^{–1}$)

$\begin{array}{1 1}(A)\;–1460.50 kJ mol^{–1}\\(B)\;–1350.50 kJ mol^{–1}\\(C)\;–1366.95 kJ mol^{–1}\\(D)\;–1361.95 kJ mol^{–1}\end{array} $

Can you answer this question?

1 Answer

0 votes
$\Delta H_C=\Delta U_C+(\Delta n)_gRT$
$\Rightarrow -1364.47kJ+(-1)8.314\times 298J$
$\Rightarrow -(1364.47+2.48)kJ$
$\Rightarrow -1366.95kJ$
Hence (C) is the correct answer.
answered Apr 7, 2014 by sreemathi.v

Related questions

Ask Question
student study plans
JEE MAIN, CBSE, AIPMT Mobile and Tablet App
The ultimate mobile app to help you crack your examinations
Get the Android App