You visited us 1 times! Enjoying our articles? Unlock Full Access!

Enthalpy of Combustion

The heat evol...

Question

The heat evolved during the combustion of 112 litre of water gas at SPT(mixture of equal volume of $H_{2}$ and CO) is : Given
$H_{2} (g) + 1 / 2 O_{2} (g) = H_{2} O (g); △ H = - 241.8 k J$
$C O (g) + 1 / 2 O_{2} (g) = {C O}_{2} (g); △ H = - 283 k J$

241.8 KJ

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

283 KJ

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

1312 KJ

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

1586 KJ

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

Open in App

Solution

The correct option is B 1312 KJ
$112$ litre gas water ${\begin{matrix} 56 l i t . H_{2} 56 l i t C O \end{matrix}$
By combustion of
$22.4$ lit of $H_{2} \to 241.8 k J$
$56$ lit of $H_{2} \to \frac{241.8 \times 56}{22.4}$
$= 604.5 k J$
By combustion of $22.41 C O \to 2.83 k J$
$∴ 56$ lit $C O = \frac{283 \times 56}{22.4}$
$= 707.5 k J$
Total heat $= 707.5 + 604.5$
$= 1.312 k J$

Suggest Corrections

Similar questions

H_{2}

H_{2} (g) + 1 / 2 O_{2} (g) = H_{2} O (g); Δ H = - 241.8 k J

C O (g) + 1 / 2 O_{2} (g) = C O_{2} (g); Δ H = - 283 k J

H_{2 (g)} + \frac{1}{2} O_{2 (g)} \to H_{2} O_{(g)}

Δ H = 241.8 k J

C O_{(g)} + \frac{1}{2} O_{2 (g)} \to C O_{2 (g)}

Δ H = 283 k J

112

H_{2}

C O

112

H_{2} (g)

C O (g)

H_{2} (g) + 1 / 2 O_{2} (g) \to H_{2} O (g)

Δ H = - 241.8 k J

C O (g) + 1 / 2 O_{2} (g) \to C O_{2} (g)

Δ H = - 283 k J

⎡ ⎢ ⎢ ⎢ ⎢ ⎢ ⎣ \begin{matrix} H_{2} (g) + \frac{1}{2} O_{2} (g) = H_{2} O (g); Δ H = - 241.8 k J C_{2} H_{2} (g) + \frac{5}{2} O_{2} (g) = 2 C O_{2} (g) + H_{2} O (g); Δ H = - 1300 k J \end{matrix} ⎤ ⎥ ⎥ ⎥ ⎥ ⎥ ⎦

C_{2} H_{2}

H_{2}

C_{3} H_{8}

C_{3} H_{8} (g) + 5 O_{2} (g) ⟶ 3 C O_{2} (g) + 4 H_{2} O (g)

3 C (s) + 4 H_{2} (g) ⟶ C_{3} H_{8} (g) Δ H / k J = - 103.8

C (s) + O_{2} (g) ⟶ C O_{2} (g) Δ H / k J = - 393.5

H_{2} (g) + 1 / 2 O_{2} (g) ⟶ H_{2} O (g) Δ H / k J = - 241.8

Join BYJU'S Learning Program