A constant-volume gas thermometer is used to measure the temperature of an object.When the thermometer is in contact with water at its triple point (273 K)the pressure in the thermometer is 8.50 x 10⁴ Pa.When it is in contact with the object the pressure is 9.65 x 10⁴ Pa.The temperature of the object is:

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The temperature of the object can be found using the relation $T = T_0 \times \frac{P}{P_0}$, where $T_0 = 273 K$ (temperature at triple point), $P_0 = 8.50 \times 10^4 Pa$ (pressure at triple point), and $P = 9.65 \times 10^4 Pa$ (pressure at object's temperature). Plugging in the values, $T = 273 \times \frac{9.65}{8.50} = 310 K$.

A Constant-Volume Gas Thermometer Is Used to Measure the Temperature