Home
Class 11
CHEMISTRY
DeltaH for combustion of ethane and ethy...

`DeltaH` for combustion of ethane and ethyne are `-341.1` and `-310.0kcal` respectively. Which gas is better for welding purpose and why ?

A

`C_(2)H_(2)`

B

`C_(2)H_(4)`

C

Both of these

D

None of these

Text Solution

Verified by Experts

The correct Answer is:
B
`Delta H " for " C_(2)H_(4) = -341.1` Kcal
its calorific value `= (-341.1)/(28)= -12.1` kcal/g.
`Delta H` for `C_(2)H_(2)= -310.0` kcal
its Calorific value `= (-310.0)/(26)= -11.92`
Hence `C_(2)H_(4)` is a better fuel.
Promotional Banner

Similar Questions

Explore conceptually related problems

DeltaH for combustion of ethene and ethyne are -341.1 and -310.0 kcal, respectively. What will be the ratio of calorific values of ethane and ethyne, respectively?

The values of heat of combustion of ethane (C_(2)H_(6)) and ethyne (C_(2)H_(2)) are -341 and -310 Kcal respectively. Then which of the following is better fuel on mass basis:

The heat of combustion of ethane and benzene is -1560 and -3268" kJ mol"^(-1) respectively. Which two has higher efficiency as fuel per gram and the amount of heat produced per gram?

The heat of hydroggenation for 3-methylbutene and 2-pentene are 30-kcal/mol and -28kcal/ mol respectively . The heats of combustion of 2-methylbutane and pentane are -784 kcal/mol and -782 kcal /mol respectively. All the values are given under standard conditions. Taking into account that combustion of both akanes give the same products, what is DeltaH (in kcal.mol)n for the following reaction under same conditions ?