Question

The following graph represents the T-V curves of an ideal gas (where T is the temperature and V the volume) at three pressures P₁, P₂ and P₃ compared with those of Charles’s law represented as dotted lines.

Options

• P₂ > P₁ > P₃

• P₁ > P₂ > P₃

• P₃ > P₂ > P₁

• P₁ > P₃ > P₂

Answer 1

P₁ > P₂ > P₃

Explanation:

From an ideal gas equation:

PV = nRT

⇒ T = `(P/(n R)) V`

i.e. T ∝ V and slope will be `P/(n R)`.

So,

P₁ > P₂ > P₃