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6. Thermodynamics question bank (Chemistry)

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Q1.

For a reversible process at T = 300 K,  
the volume of an ideal gas is increased from Váµ¢ = 1 L to V𝒻 = 10 L.  
Calculate ΔH if the process is isothermal:

(A)
11.47 kJ
(B)
4.98 kJ
(C)
0
(D)
−11.47 kJ
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Q2.

The conversion A to B is carried out by the following path:  

Given:  
ΔS₍A → Câ‚Ž = 50 e.u.  
ΔS₍C → Dâ‚Ž = 30 e.u.  
ΔS₍B → Dâ‚Ž = 20 e.u.

Where e.u. is entropy unit.  
Then ΔS₍A → Bâ‚Ž is:

(A)
+100 e.u.
(B)
+60 e.u.
(C)
−100 e.u.
(D)
−60 e.u.
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