an open vessel at 27°C is heated until one fourth of the air has been expelled. assuming that the volume of vessel is constant, the temperature to which vessel has been heated is?
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As we know through Ideal gas law
Number of moles is inversely proportional to Temperature
Ni / Nf = Tf / Ti
Ni = initial number of moles
= N
Nf= Final number of moles
= N-N/4= 3N/4
Ti= initial temperature
=27℃ =300K
Tf=final temperature
=????
Tf =( Ni×Ti)/Ng
Tf =( N × 300)/ 3N/4
Tf =400K
Tf= 400K
= 400-273
= 127℃
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