A bulb with chlorine gas at ambient pressure contains 3.55 g at t°C. When the bulb is placed in a second thermostat at a temperature 30°C higher and the stopcock of the bulb temporarily opened (and cl

Question

A bulb with chlorine gas at ambient pressure contains 3.55 g at t°C. When the bulb is placed in a second thermostat at a temperature 30°C higher and the stopcock of the bulb temporarily opened (and closed again) to restore the initial pressure, the bulb is now found to contain 3.2 g of chlorine. What is the value of t°C?

Prashant Kotian · Accepted Answer

Correct answer: D. Since both pressure and volume are restored to their initial values, the ideal gas equation yields w1 * T1 = w2 * T2. Substituting the values: 3.55 * (t + 273) = 3.2 * (t + 30 + 273) => 3.55t + 969.15 = 3.2t + 969.6 => 0.35t = 0.45 => t = 1.28°C.

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