Heat and Thermodynamics

Problems

1. The pressures of a gas in a constant volume gas thermometer are 100 cm and 137 cm of mercury at 0°C and 100°C, respectively. On introduction in to a bath the pressure is found to be 126 cm of mercury. Calculate its temperature.

    

   Ans. 70°C

2. When the bulb of a constant volume gas thermometer is placed in melting ice, the level of mercury in the upper tube is 5 cm below the level in the closed limb. When the bulb is at 273°C, the level in the open limb is 65 cm high. Calculate the barometric pressure.

    

   Ans. 75 cm

3. The pressure of air in a constant volume gas thermometer is 8 cm and 109.3 cm at 0°C and 100°C, respectively. When the bulb is placed in some hot water, the pressure is 100 cm. Calculate the temperature of hot water.

    

   Ans. 68.3°C ...