Question

1 litre of an ideal gas at 27 °C is heated at a constant pressure to 127 °C. The final volume is approximately ______.

Options

• 7.5 litre

• 1.3 litre.

• 0.75 litre

• 13 litre

Answer 1

1 litre of an ideal gas at 27 °C is heated at a constant pressure to 127 °C. The final volume is approximately 1.3 litre.

Explanation:

At constant pressure,

`"V"_1/"T"_1 = "V"_2/"T"_2`

Here `"T"_1` = 27° C = 300 K

`"T"_1` = 127° C = 400 K

`therefore 1/300 = "V"_2/400`

V₂ = 1.3 litre