At constant pressure, the volume of a given mass of a gas ......... by 1/273 of its volume at ........... for each one degree rise in temperature.

Explanation

To solve the question, we will rely on Charles's Law, which describes the relationship between the volume and temperature of a gas at constant pressure. Here’s the step-by-step solution:

### Step 1: Understand Charles's Law
Charles's Law states that the volume of a given mass of gas is directly proportional to its absolute temperature (in Kelvin) when the pressure is held constant. This can be mathematically expressed as:
\[ V \propto T \]
or
\[ \frac{V_1}{T_1} = \frac{V_2}{T_2} \]

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