In a constant-volume gas thermometer

PHYSICS · Subjective · CBSE · Physics · Thermal Properties of Matter · Thermal Properties of Matter

Problem

In a constant-volume gas thermometer, the pressure of the working gas is measured by the difference in the levels of mercury in the two arms of a

U

-tube connected to the gas at one end. When the bulb is placed at room temperature

27.0^\circ\text{C}

, the mercury column in the arm open to the atmosphere stands

5.00\ \text{cm}

above the level of mercury in the other arm. When the bulb is placed in a hot liquid, the difference in mercury levels becomes

45.0\ \text{cm}

. Calculate the temperature of the liquid. Atmospheric pressure is

75.0\ \text{cm}

of mercury.