Question

The expansion of unit mass of a perfect gas at constant pressure is shown in the diagram. Here

• A. a = volume, b = ⁰C temperature
• B. a = volume, b = K temperature
• C. a = ⁰C temperature, b = volume
• D. a = K temperature, b = volume

Answer 1

Answer: (C)

a = ⁰C temperature, b = volume

Answer 2

In the given graph line have a positive slop with X-axis and negative intercept on Y-axis.

So we can write the equation of line y = mx – c ...... (i)

According to Charle’s law $V_{t} = \frac{V_{0}}{273}t + V_{0}$, by rewriting this equation we get

$t = \left( \frac{273}{V_{0}} \right)V_{t} - 273$ ......(ii)

By comparing (i) and (ii) we can say that time is represented on Y-axis and volume in X-axis.