(a) Consider the following two stage process Stage 1 The system abso...

a Total energy absorbs 8363 146j Q 146J w4427 17J w is ve sign ....

(a) Consider the following two stage process: Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Stage 1. The system absorbs 83 J of heat...

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Chemistry

(a) Consider the following two stage process:
Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Stage 1. The system absorbs 83 J of heat and during this process ithad 44 J of work done on it.
Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Stage 2. The system absorbs 63 J of heat and during this process itdoes 27 J of work on the surroundings.
Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Calculate Q, w, and Î”E for the overall process
(b) A piston is compressed from a volume of 7.5 L to 2.2 L at aconstant pressure of 1.5 atm. During this process, the system alsoabsorbs 266 J of heat. Calculate Î”E for this process.

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4.1 Ratings (825 Votes)

a). Total energy absorbs = 83+63 =146j

Q = 146J

w=44-27 = 17J ,Â Â w is +ve sign because workdone on the system

Î”E= Q+w = 146 + 17 = 163 J.

b).Volume change = Î”V = 7.5-2.2 = 5.3 L

Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â P = 1.5 atm

Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â W= PÎ”V = 1.5 x 5.3 = 7.95 L-atm = 7.95 x 101.325J = 805.534 JÂ Â ( 1 L-atm = 101.325J)

Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Q = 266 J

Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Î”E = Q +W = 266 - 805.534 = - 539.534 JÂ Â Â Â Â Â Â Â Â Â ( W is +ve because workdone onthe system)

Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Î”E= - 539.5 J.

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(a) Consider the following two stage process: Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Stage 1. The system absorbs 83 J of heat...

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