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Can anyone kindly answer the question below(and explain why he/she chose the staement).
Q.Two bulbs R and S, connected by a mercury manometer, are held in a thermostat, as shown. The volume of R is twice that of S. R contains gas, X, at the same pressure as the nitrogen in S.When the temperature is increased, which gases in bulb R would cause the mercury level in the right-hand limb of the manometer to rise? 1. an equilibrium mixture N2F4(g) to 2NF2(g); ∆H positive. (PAST PAPER REFERENCE;M-J/2007/PAPER 1/Q34.)
I guess here the question is focusing on the number of moles.... Considering that there is one mole of Nitrogen in bulb S than according to this in case where temperature is low equilibrium in reaction 1 will also have one number of moles for reverse reaction is being favoured but when temperature is being increased it will result in forward reaction being favoured and the number of moles of gas being produced increasing thus large number of moles of gas causes the mercury on left hand side to decrease due to increased pressure and right hand side to increase for the number of moles in s are low.For the rest of the options in both cases one mole is being produced thus having no effect on the mercury level.