Calorific value of ethane- in kJ-g if for the reaction is- 2C2H6-7O2- 4CO2-6H2O- H-745-6 kcal-

The correct option is D 52 Heat of combustion of ethane = 745.6/2= 372.8 Kcal mol^ 1= 1559.79 KJ mol^ 1 #160; #160; #160; #160;( 1 c ...

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Standard XII

Chemistry

Lattice Energy

Calorific val...

Question

Calorific value of ethane, in kJ/g if for the reaction is: $2 C_{2} H_{6} + 7 O_{2} \to 4 C O_{2} + 6 H_{2} O; Δ H = - 745.6$ kcal.

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Solution

The correct option is D $- 52$
Heat of combustion of ethane $= - \frac{745.6}{2} = - 372.8 K c a l m o l^{- 1} = - 1559.79 K J m o l^{- 1}$ ( $1 c a l . = 4.2 J$ )
$c a l o r i f i c v a l u e = \frac{h e a t o f c o m b u s t i o n}{g r a m m o l e c u l a r w e i g h t o f f u e l} = - \frac{1559.79}{30} = - 51.98 \approx 52 K J g m^{- 1}$

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Similar questions

Q. Calorific value of ethane, in kJ/g if for the reaction :

2 C_{2} H_{6} + 7 O_{2} \to 4 C O_{2} + 6 H_{2} O; Δ H = - 745.6 k c a l

Q. Calorific value of ethane, in KJ/g for the reaction

2 C_{2} H_{6} + 7 O_{7} ⟶ 4 {C O}_{2} + 6 H_{2} O

;

Δ H = - 745.6 K c a l

What volume of oxygen would be required for complete combustion of 100 litres of ethane according to the following equation?
2C₂H₆ + 7O₂ $\overset{}{\to}$ 4CO₂ + 6H₂O

Q. What volume of oxygen would be required for the complete combustion of 100 litres of ethane according to the following equation?

2 C_{2} H_{6} + 7 O_{2} \to 4 C O_{2} + 6 H_{2} O

Q. Ethane burns in oxygen to form

C O_{2}

and

H_{2} O

according to the equation:

2 C_{2} H_{6} + 7 O_{2} \to 4 C O_{2} + 6 H_{2} O

.
If

1250

cc of oxygen is burnt with

300

cc of ethane.
Calculate:
(i) the volume of

C O_{2}

formed.
(ii) the volume of unused

O_{2}

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Calorific value of ethane, in kJ/g if for the reaction is: 2C2H6+7O2→4CO2+6H2O;ΔH=−745.6 kcal.

The correct option is D −52Heat of combustion of ethane =−745.62=−372.8Kcalmol−1=−1559.79KJmol−1 (1cal.=4.2J)calorificvalue=heatofcombustiongrammolecularweightoffuel=−1559.7930=−51.98≈52KJgm−1

Calorific value of ethane, in kJ/g if for the reaction is: $2 C_{2} H_{6} + 7 O_{2} \to 4 C O_{2} + 6 H_{2} O; Δ H = - 745.6$ kcal.