Question

The volume of a gas at 20°C is 100 cm³ at normal pressure. If it is heated to 100°C, its volume becomes 125 cm³ at the same pressure, then volume coefficient of the gas at normal pressure is

• A. 0.0015/°C
• B. 0.0045/°C
• C. 0.0025/°C
• D. 0.0033/°C

Answer 1

Answer: (D)

0.0033/°C

Answer 2

$\frac{V_{1}}{V_{2}} = \frac{1 + \gamma t_{1}}{1 + \gamma t_{2}}$ ⇒ $\frac{100}{125} = \frac{1 + \gamma \times 20}{1 + \gamma \times 100}$ ⇒ γ = 0.0033/°C