Question

A litre of air is heated from 27°C to 177°C at constant pressure.lts volume is

Answer 1

Answer:

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Answer 2

Answer:

The final volume of the air after heating is equal to 1.5Litres.

Explanation:

Given: The pressure is constant.

Initial  temperature of the air, $T_{1}=27^{o}C=273+27=300K$

Final temperature,  $T_{2}=177^{o}C=177+273=450K$

The initial volume of the air, $V_{1}=1L$

From the Charles law : At constant pressure, temperature   is directly proportional to volume of the gas i.e. V ∝ T

Therefore  $\frac{V_{2}}{V_{1}} =\frac{T_{2}}{T_{1}}$                                     ...................(1)

Put the values  of T₁, T₂ and V₁ in eq.(1),

⇒     $\frac{V_{2}}{1} =\frac{450}{300}$

∴     $V_{2}=1.5L$

Therefore the volume of air change from 1Litre to 1.5Litres after heating.