QUESTION 7 Consider the following reaction at equilibrium Wh

QUESTION 7 Consider the following reaction at equilibrium. What effect will decreasing the temperature have on the system? co2(g) + 2 H2O(l)-CH4(g) + 2 O2(g) = +890 kJ 0 No effect will be observed. The equilibrium constant will increase and then decrease. O The reaction will shift to the left in the direction of reactants 0 The equilibrium constant will decrease and then increase O The reaction will shift to the right in the direction of products

Solution

Question 7

This is based in LeChatlier\'s principle.

According to this principle, when a system at equilibrium is subjected to a change in the concentration of substrates or change in temperature or change in pressure of gaseous substrates then the equilibrium will shift in such a direction that it nullifies the change.

For the given reaction delta H is positive .this indicates that the reaction is endocthermic in the forward direction.

Increase in temperature favours the formation of products.Then the equilibrium shift towards right.

Where as decrease in temperature favours the formation of reactants and the equilibrium shift towards left .

Third option is correct.