Question

On 0⁰C pressure measured by barometer is 760 mm. What will be pressure on 100⁰C

• A. 760 mm
• B. 730 mm
• C. 780 mm
• D. None of these

Answer 1

Answer: (D)

None of these

Answer 2

From Gay Lussac’s law $\frac{P_{2}}{P_{1}} = \frac{T_{2}}{T_{1}} = \left( \frac{100 + 273}{0 + 273} \right) = \frac{373}{273}$

⇒ $P_{2} = \left( \frac{373}{273} \right) \times 760 = 1038mm$.