The following reactions are carried out at atmospheric pressure (external) insid

Question

The following reactions are carried out at atmospheric pressure (external) inside the chamber of a piston. Will the piston plunger have moved out (expanded) or moved in (contracted) after the reaction has occurred and the system was allowed to return to its initial temperature of 110 degree C? N_2(g) + 3 H_2(g) rightarrow 2 NH_3(g) Piston expanded Piston contracted Piston is unchanged C(s) + O_2(g) rightarrow CO_2(g) Piston expanded Piston contracted Piston is unchanged C_2H_5OH(g) + 3 O)_2(g) rightarrow 2 CO_2(g) + 3 H_2O(g) Piston expanded Piston contracted Piston is unchanged.

Explanation / Answer

a.no of moles of gaseous species as well as volume of the system decreases. So piston will contract.

b. No.of moles of gaseous species as well as volume is unchanged. So piston is unchanged

c. No.of moles of gaseous species as well as volume increases. So piston will expand.

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