Given the equation representing a system at equilibrium in a sealed, rigid container:
2HI(g) <->H2(g) + I2(g) + energy
Increasing the temperature of the system causes the concentration of
1)HI to increase
2)H2 to increase
3) HI to Remain constant
4) HI to Remain constant

1) HI to increase

Explanation:

Any change in the equilibrium is studied on the basis of Le-Chatelier's principle.This principle states that if there is any change in the variables of the reaction, the equilibrium will shift in the direction to minimize the effect.

As the given reaction is exothermic , on increasing the tempearture, the equilibrium will shift in the direction where decrease in tempearture is taking place.So, the equilibrium will shift in the left direction. i.e. towards reactants. Thus amount of will increase.

particle   p is an electron and particle q is a neutron