CameraIcon

SearchIcon

MyQuestionIcon

1

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

Relation between Kp and Kc

In the reacti...

Question

In the reaction

$C S_{2} (l) + 3 O_{2} (g) \to C O_{2} (g) + 2 S O_{2} (g) Δ H = - 265 k c a l$

The enthalpies of formation of $C O_{2}$ and $S O_{2}$ are both negative and are in the ratio 4 : 3. The enthalpy of formation of $C S_{2}$ is $+ 26 k c a l / m o l$ . Calculate the enthalpy of formation of $S O_{2}$ .

A

−90 kcal/mol

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

B

−52 kcal/mol

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

C

−78 kcal/mol

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

D

−71.7 kcal/mol

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

Open in App

Solution

The correct option is D
−71.7 kcal/mol

$C S_{2} (l) + 3 O_{2} (g) \to C O_{2} (g) + 2 S O_{2} (g)$

$Δ H = - 256 K c a l$

Let $Δ H_{r} (C O_{2}, g) = - 4 x$ and $Δ H_{r} (S O_{2}, g) = - 3 x$

$Δ H_{r e a c t i o n} = Δ H_{f} (C O_{2}, g) + 2 Δ Δ_{f} (S O_{2}, g) - Δ H_{f} (C S_{2} I)$

$- 265 = - 4 x - 6 x - 26$

$x = + 23.9$

$∴ Δ_{f} (S O_{2}, g) = 3 x = - 71.7 K c a l / m o l$

Suggest Corrections

thumbs-up

0

Similar questions

Q. In the reaction

C S_{2} (l) + 3 O_{2} (g) \to C O_{2} (g) + 2 S O_{2} (g) △ H = - 265 k c a l

The enthalpies of formation of

C O_{2}

S O_{2}

are both negative and are in the ratio 4 : 3. The enthalpy of formation of

C S_{2}

is + 26 kcal/mol. Calculate the enthalpy of formation of

S O_{2} .

Q. In the reaction

C S_{2} (l) + 3 O_{2} (g) \to C O_{2} (g) + 2 S O_{2} (g) Δ H = - 265 k c a l

. The enthalpies of formation of

C O_{2}

S O_{2}

are both negative and are in the ratio 4 : 3. The enthalpy of formation of

C S_{2}

is + 26 kcal/mol. Calculate the enthalpy of formation of

S O_{2}

.

Q. In the reaction

C S_{2} (l) + 3 O_{2} (g) \to C O_{2} (g) + 2 S O_{2} (g) △ H = - 265 k c a l

The enthalpies of formation of

C O_{2}

S O_{2}

are both negative and are in the ratio 4 : 3. The enthalpy of formation of

C S_{2}

is + 26 kcal/mol. Calculate the enthalpy of formation of

S O_{2} .

The standard enthalpy of formation of octane (C₈H₁₈) is −250 kJ/mol. Calculate the enthalpy of combustion of C₈H_18.
Given : enthalpy of formation of CO₂(g) and H₂O(l) are −394 kJ/mol and −286 kJ/mol respectively:

Q. The enthalpy change for a reaction

N_{2} (g) + 3 H_{2} (g) \to 2 N H_{3} (g)

is -92.2 kJ/mol. Calculate the enthalpy of formation of ammonia.

View More

Join BYJU'S Learning Program

similar_icon

Related Videos

lock

Equilibrium Constants

CHEMISTRY

Watch in App

explore_more_icon

Explore more

Relation between Kp and Kc

Standard XII Chemistry

Join BYJU'S Learning Program

CrossIcon