Question

For the reaction: \[ \text{BaO} (s) + \text{O}_2(g) \rightarrow \text{BaO}_2(s) \] \( \Delta H = +ve \), In equilibrium condition, pressure of \( O_2 \) is dependent on:

• A. mass of \( \text{BaO}_2 \)
• B. mass of \( \text{BaO} \)
• C. temperature of equilibrium
• D. mass of \( \text{BaO}_2 \) and \( \text{BaO} \) both

Hint:

The position of equilibrium in reactions with positive enthalpy changes shifts with temperature, as governed by Le Chatelier’s Principle.

Answer 1

The Correct Option is C

Step 1: In reactions with a positive \( \Delta H \), the equilibrium position shifts with temperature. The pressure of \( O_2 \) is influenced by the temperature at equilibrium.

Final Answer: \[ \boxed{\text{temperature of equilibrium}} \]