Home
Class 11
CHEMISTRY
The data given below are for vapour phas...

The data given below are for vapour phase reactions at constant pressure.
`C_(2)H_(6)rarroverset(*)(C_(2))overset(*)(H_(5))+overset(*)(H), DeltaH=-4200kJmol^(-1)`
`overset(*)(C_(2))H_(6) rarr C_(2)H_(4)+overset(*)(H), DeltaH=168kJ mol^(-1)`
The enthalpy change for the reaction `,`
`2overset(*)(C_(2))H_(5) rarr C_(2)H_(6)+C_(2)H_(4)` is `:`

A

`+250KJmol^(-1)`

B

`+588KJmol^(-1)`

C

`-252KJmol^(-1)`

D

`-588KJmol^(-1)`

Text Solution

Verified by Experts

The correct Answer is:
C
`-420+168`
Promotional Banner

Similar Questions

Explore conceptually related problems

Complete the reaction : C_(6)H_(6) overset(O_(3))toA overset(Zn, H_(2)O)toB

In the given reaction sequene : C_(6)H_(5)-CN overset((H_(2)O)//overset(o+)(H)//Delta)toA overset(SOCl_(2))toB overset(C_(6)H_(6)//AlCl_(3))toC , (C) is

The products formed in the reaction are : C_(6)H_(5)-overset(O)overset(||)C-OH+CH_(3)overset(18)OHunderset("Heat")overset(H_(2)SO_(4))rarr

C_(2)H_(5)OHoverset(PCl_(5))rarr(A)overset(KCN)rarr(B)overset(H_(3)O^(+))rarr(C)overset(NH_(3))rarr(D)overset("heat")rarr(E)

In the reaction sequence C_(6)H_(5)-underset(O)underset(||)C-CH_(3)overset(NH_(2)OH//overset(o+)H)rarr(A)overset(P_(2)O_(5))rarr [X] [X] will be

C_(2)H_(5) - overset(O)overset(||)(C ) - CI overset(Ch_(2) N_(2)//Ag_(2) O//H_(2) O)(to) A overset(B_(2)H_(6))(to) B . A and B are

In the reaction sequence : C_(2)H_(5)OH overset(PBr_(3))(rarr) A overset(KCN)(rarr) B overset(H_(2)O^(+))(rarr) C C is :