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Standard XII

Chemistry

Mechanism of Adsorption

Calculate Δ...

Question

Calculate ${(Δ S)}_{u n i v e r s e}$ (in cal/K) when $1 k g$ water at $300 K$ is brought into contact with a heat reservoir at $600 K$ . Specific heat of water is $1 c a l / {g m -}^{o} C$ ( $ln 2 = 0.7$ ).

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Solution

$Δ S = m C ln (\frac{T_{2}}{T_{1}}) = Δ S_{u n i v e r s e}$
$Δ S_{u n i v e r s e} = 1000 \times 1 \times ln (\frac{600}{300}) = 1000 \times ln 2 = 700$ $J K^{- 1}$

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Calculate (ΔS)universe (in cal/K) when 1kg water at 300K is brought into contact with a heat reservoir at 600K. Specific heat of water is 1cal/gm−oC (ln2=0.7).

ΔS=mCln(T2T1)=ΔSuniverseΔSuniverse=1000×1×ln(600300)=1000×ln2=700 JK−1

Calculate ${(Δ S)}_{u n i v e r s e}$ (in cal/K) when $1 k g$ water at $300 K$ is brought into contact with a heat reservoir at $600 K$ . Specific heat of water is $1 c a l / {g m -}^{o} C$ ( $ln 2 = 0.7$ ).

$Δ S = m C ln (\frac{T_{2}}{T_{1}}) = Δ S_{u n i v e r s e}$
$Δ S_{u n i v e r s e} = 1000 \times 1 \times ln (\frac{600}{300}) = 1000 \times ln 2 = 700$ $J K^{- 1}$