Questions & Answers

Question

Answers

(A) 1890.0 K

(B) 2480.3 K

(C) 2040.5 K

(D) 2380.5 K

Answer

Verified

92.1k+ views

Reaction given in the question:

\[MgO(s)+C(s)\to Mg(s)+CO(g)\]

Other given data from the question:

Enthalpy of the reaction i.e. ${{\Delta }_{r}}{{H}^{0}}=+491.1kJmo{{l}^{-1}}$

And the value of ${{\Delta }_{r}}{{S}^{0}}=198.0J{{K}^{-1}}mo{{l}^{-1}}$

Given that the reaction is not feasible at 298K

Temperature above which reaction will be feasible can be calculated by the ratio of delta H to delta S.

We will convert the value of enthalpy from KJ to J and the conversion from kJ to J is done by multiplying the number with 1000.

The temperature above which reaction will be feasible = $\dfrac{\Delta H}{\Delta S}=\dfrac{(491.1)(1000)}{198}$

The temperature above which reaction will be feasible= 2480.3 K

Enthalpy is an equivalent quantity which is equal to the total heat content of the system or we can say that the enthalpy is equal to the internal energy of the system plus the product of volume and pressure.

Students Also Read