HOME EXAM ii –WINTER 2012-2013
CHEMICAL ENGINEERING THERMODYNAMICS –CHE203
To be submitted before 5/12/2012
Q1-A:
Ammonia (NH3) (n+m+l) Kg/h are to change their state from(N+M+L)*3 °C and (N+M)*1.2 Psia
to -40 °C at the same pressure(isobaric process) .CALCULATE THE amount of heat that must be
removed ?.determine the change in specific volume ?.
B:if the same amount of ammonia is to change the state from T=(N+M+L)*2.5 ° C and (N+M+L)
*1.25 Psia to T= (N+M+L)*8 °C through an isochoric process? What is the amount of heat
transferred ? what is the work done through the process assuming that for ammonia the
following equation of state P.V=Z.R.T ?. figure A.2 (figures sheet ) and tables E1 to E4 are
applicable and useful) .
Q2- (n+m+l) kg/min of saturated liquid water at P=(n+l )*650 kPa are to change their state to a
temperature of (n+m+l)*25 °C. Determine the overall changes in H,U, and volume V?
Q3- S.water at (n+m+l)*400 kPa. And a quality x=0.09 is heated under constant PRESSURE
Up t 580 °C . Lay down the values of all specific thermodynamic properties H,V,T,P ?. what is the
amount of heat added for this purpose ?
Q4-1000 mole of n-heptane are heated from (n+m+l) °C to (n+m+l )*10°C under constant
pressure of 1 atm. determine the amount of heat added?. See table C-1 of the text.
Q5-1000 tn of methanol (CH3OH) are to be cooled from (n+m+l) *15 °C ,1 atm to 15°C and 1 atm
. determine the amount of heat removed?.
Q6- methane changes state from (n+m+l)*25 °F and 500 Psia to a final state with T =60 °F
assuming that the process is mechanically reversible and was done with ΔS =0.determine the
changes in all relative thermodynamic properties?.
Q7-Freon ( R 134a)=(HFC -134a) expands from {–(n+m+l)}°F and 400 Psia to 60 F and 4 Psia
.determine the changes in all relative thermodynamic properties?.
Q8-38500 jouls were added to 1 mole of carbon dioxide (CO2). If the initial temperature of CO2 is
(n+m+l)*25 K .estimate the final temperature of carbon dioxide?.
GOOD LUCK
DR. JAMAL AMOUS