A litre of air is heated from 27⁰C to 177⁰C at constant pressure. Find its volume

$\mathrm{Here} \mathrm{pressure} \mathrm{is} \mathrm{constant}$

$\mathrm{So} \mathrm{volume} \mathrm{is} \mathrm{directly} \mathrm{proportional} \mathrm{to} \mathrm{absolute} \mathrm{temperarture}$

$\frac{{\mathrm{V}}_1}{{\mathrm{T}}_1}=\frac{{\mathrm{V}}_2}{{\mathrm{T}}_2}$

$\mathrm{here} {\mathrm{T}}_1=273+27=300\mathrm{K}$

$T_2=273+127=450K$

${\mathrm{V}}_2=\frac{{\mathrm{V}}_1{\mathrm{T}}_2}{{\mathrm{T}}_1}=\frac{1\times 450}{300}=1.5 l\mathrm{it}$