calculate to the nearest whole number the change in internal energy and amount of heat...

calculate to the nearest whole number the change in internal energy and amount of heat energy required to double the volume of 22g of carbon (iv) oxide at 20*oC?

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Answers (1)

busari
2 months ago
The heat supplied to the System (vessel) for it to double its volume is Q=m•Cp•∆T. The new temperature responds to PV=nRT at constant pressure , with n=22/(22+2•16)= 0.5 mol, being R=0.082 atm•lit/mol•K, T1=293K then T2/T1=(V2/V1) meaning that T2= 293K•2=586K then ∆T= 586–293= 293K and un this range Cp=0.846 J/g•K then Q= 22g•0.846J/g•K•293K= 5.45 kJ and for the work done in the expansion W=P•∆V we assume a pressure of one atmosphere so W= 2 atm•lt = 2×101.325= 202.65 and finally the internal energy change is ∆U=Q-W = 5.45–0.20= 5.25 kJ
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