Question

Coefficient of real expansion of mercury is 0.18 × 10^–3/°C. If the density of mercury at 0°C is 13.6 gm/cc. its density at 473K is

• A. 13.11 gm/cc
• B. 26.22 gm/cc
• C. 52.11 gm/cc
• D. None of these

Answer 1

Answer: (A)

13.11 gm/cc

Answer 2

$\rho = \rho_{0}(1 - \gamma.\Delta\theta) = 13.6\lbrack 1 - 0.18 \times 10^{- 3}(473 - 273)\rbrack$

$= 13.6\lbrack 1 - 0.036\rbrack = 13.11gm/cc$.