## Question

###### Equilibrium question(high rating guaranteed)

For the endothermic reactionH2(g) + I2(g) <---------> 2HI (g)which of1) increasing the pressure2) decreasing the volume3) increasing the temperaturewill shift the equilibrium toward the products?Please show your reasoning!also how do I know how many moles are there for eachelements?

## Answers

For endothermic reactions heat is taken from thesurroundings.

H_{2}(g) + I_{2}(g) +Heat <---------> 2HI(g)

a) Number of moles on the both sides is same. Pressure isrelated to the number of moles. As the pressure increasesshift takes place in suchdirection that will reduce theeffect.

But here moles are common. So no effectof pressure.

b ) Volume doesn't effect the above equilibrium.Because decreasing volume increases the pressure. But pressure hasno effect on abovesystem.

c) On increasing temperature equilibrium shifts in the endothermicside.

All these are depending upon the Le Chatelier's principle.

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