1) What is the final temperature when heat of 1100kJ is added to 30moles of SO2

Question

1) What is the final temperature when heat of 1100kJ is added to 30moles of SO2 initially at 300 Celsius in
a steady flow heat exchanger at atmospheric pressure

2)One (1) mol of Propane is placed in an adiabatic, constant pressure combustion chamber at 25 C.
The reaction will follow: C3H8 + 5O2 3CO2 + 4H2O
What is the final temperature of the system under those various cases? Assume complete
combustion.
a. it is mixed with a stoichiometric amount of oxygen and reacts to form H2O and CO2

b. It is mixed with a stoichiometric amount of air (same reaction than a)

Explanation / Answer

1) Q = m*Cp* (T2-T1)

m = mass of SO2 = 30 moles * 64 gm/mole = 1920 gm = 1.92 kg

cp = specific heat of SO2 = 0.72 Kj/kg K

T1 = Initial temp = 300 C = 573 K

T2 = final temp = ?

Q = heat transfer = 1100 KJ

1100 = 1.92 * 0.72 * (T2-573)

T2 = 1368.71 K = 1095.71 C

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