For a zero-order reaction: 2NH3(g) → N2(g) + 3H2(g), the rate of reaction is 0.1 atm/s. Initially only NH3(g) was present at 3 atm and the reaction is performed at constant volume and temperature. The

Question

For a zero-order reaction: 2NH3(g) → N2(g) + 3H2(g), the rate of reaction is 0.1 atm/s. Initially only NH3(g) was present at 3 atm and the reaction is performed at constant volume and temperature. The total pressure of gases after 10 s from the start of reaction will be

Prashant Kotian · Accepted Answer

Correct answer: B. Rate of reaction = 0.1 atm/s. Let extent be x. In 10s, x = 1 atm. P_NH3 reacted = 2x = 2 atm. Remaining P_NH3 = 3 - 2 = 1 atm. P_N2 formed = x = 1 atm. P_H2 formed = 3x = 3 atm. Total pressure = 1 + 1 + 3 = 5 atm. Therefore, correct answer is B.

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