Question

If on heating liquid through 80°C, the mass expelled is (1/100)^th of mass still remaining, the coefficient of apparent expansion of liquid is

• A. 1.25 × 10^–4/°C
• B. 12.5 × 10^–4/°C
• C. 1.25 × 10^–5/°C
• D. None of these

Answer 1

Answer: (A)

1.25 × 10^–4/°C

Answer 2

$\gamma_{\text{app.}} = \frac{\text{Mass expelled}}{\text{Mass remained} \times \ \Delta T}$

$= \frac{x/100}{x \times 80} = \frac{1}{8000} = 1.25 \times 10^{- 4}/{^\circ}C$