11th Class Chemistry Chapter 7 Thermochemistry Short Question Answers Below
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dq = dE + dW
Since dw = – ve
so dq = dE- dw
This equation gives us quantitative relationship of heat and work.
PΔV = 0
ΔH ΔE+ PΔV
ΔH = ΔE +p *0
ΔH0f = ΔH0s + ΔH01 + ΔH0D/2 + ΔH0E + ΔH/
A strong acid and a strong base are completely dissociated in water to give H+ and OH–. There ions combine to give H2O when they are mixed.
- Prove that qp = ΔH.
Ans. Since q = ΔE + W
W = PΔV
qp = ΔE + PΔV
qp = (E2 – E1) + P (V2 – V1)
qp = (E2 + PV2) – (E1 + PV1)
qp = H2 – H1
qp = ΔH
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