Question

hello guys i am new here please solve this question step by step........ ❤❤☺☺

Answer 1

B) 477°C

Solution:
Since the vessel is open to the air the number of molecules of air is not fixed, but the pressure and temperature are. As the vessel is heated air will escape from it so that the pressure remains constant. 

n1T1 = n2T2 ................... from PV=nRT 
T2 = n1T1 / n1 ................ solve for T2 
T2 = 5/5 x 300K / 2/5 
T2 = 750K ............ or ............. 477°C

Answer 2

Ahola dear.....here is your answer......