Calorific value of ethane, in KJ/g for the reaction
$2 C_{2} H_{6} + 7 O_{7} ⟶ 4 {C O}_{2} + 6 H_{2} O$ ; $Δ H = - 745.6 K c a l$

- 12.4

No worries! We‘ve got your back. Try BYJU‘S free classes today!

- 52

Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses

- 24.8

No worries! We‘ve got your back. Try BYJU‘S free classes today!

- 104

No worries! We‘ve got your back. Try BYJU‘S free classes today!

Open in App

Solution

The correct option is B $- 52$
Given
Heat of combustion of ethane $= \frac{- 745.6}{2} = - 372.8 K c a l / m o l e$

$1 K c a l = 4.18 J$

$∴ 3 = - 372.8 K c a l = - 372.8 \times 4.18 = - 1559.7959 K J / m o l$

$C a l o r i f i c v a l u e = \frac{H e a t o f c o m b u s t i o n}{g r a m m o l e c u l a r w e i g h t o f f u e l} = \frac{- 1559.8}{30} = - 52 K J / g$

Suggest Corrections

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 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.

Q. Chemical equation for the reaction between ethane gas and oxygen is given below:

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

(a) How many moles of ethane should react to form

20

mole

{C O}_{2}

(b) How many molecules are present in

67.2 L

ethane at STP?

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

Join BYJU'S Learning Program

Calorific value of ethane, in KJ/g for the reaction2C2H6+7O7⟶4CO2+6H2O; ΔH=−745.6 Kcal

The correct option is B −52GivenHeat of combustion of ethane =−745.62=−372.8 K cal/mole1K cal=4.18J∴3=−372.8 K cal=−372.8×4.18=−1559.7959KJ/molCalorificvalue=Heat of combustiongram molecular weight of fuel=−1559.830=−52KJ/g

Calorific value of ethane, in KJ/g for the reaction
$2 C_{2} H_{6} + 7 O_{7} ⟶ 4 {C O}_{2} + 6 H_{2} O$ ; $Δ H = - 745.6 K c a l$