SATHEE: Chemical Thermodynamics Question 475

Chemical Thermodynamics Question 475

Question: The heat of hydration of solution anhydrous $C u S O_{4}$ and hydrated $C u S O_{4} \cdot 5 H_{2} O$ are - 66.5 and 11.7 kJ $m o l^{- 1}$ respectively. Calculate the heat of hydration of $C u S O_{4}$ to $C u S O_{4} \cdot 5 H_{2} O$

Options:

A) - 78.2 kJ

B) - 81.2 kJ

C) - 68.2 kJ

D) - 60.1 kJ

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Answer:

Correct Answer: A

Solution:

The required equation is : $C u S O_{4} (S) + 5 H_{2} O (l) \to$

$C u S O_{4} .5 H_{2} O (s) Δ H = -$

given that $C u S O_{4} .5 H_{2} O (S) + a q . \to C u S O_{4} . (a q); Δ H_{2} = + 11.7 k J$

The process of hydration may be expressed as $\underset{Δ H}{C u S O_{4}}, (s) \overset{Δ H_{1}}{\to} \underset{Δ H_{2}}{C u S O_{4} (a q)},$

$C u S O_{4} .5 H_{2} O$

According to Hess’s law $Δ H_{1} = Δ H + Δ H_{2}$

$Δ H_{1} = Δ H - Δ H_{2}$

$= -, 66.5 - 11.7 = - 78.2 k J$

Chemical Thermodynamics Question 475

Question: The heat of hydration of solution anhydrous $C u S O_{4}$ and hydrated $C u S O_{4} \cdot 5 H_{2} O$ are - 66.5 and 11.7 kJ $m o l^{- 1}$ respectively. Calculate the heat of hydration of $C u S O_{4}$ to $C u S O_{4} \cdot 5 H_{2} O$

Options:

Answer:

Solution:

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Chemical Thermodynamics Question 475

Question: The heat of hydration of solution anhydrous CuSO4 and hydrated CuSO4⋅5H2O are - 66.5 and 11.7 kJ mol−1 respectively. Calculate the heat of hydration of CuSO4 to CuSO4⋅5H2O

Options:

Answer:

Solution:

Engineering Preparation

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Other Resources

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Question: The heat of hydration of solution anhydrous $C u S O_{4}$ and hydrated $C u S O_{4} \cdot 5 H_{2} O$ are - 66.5 and 11.7 kJ $m o l^{- 1}$ respectively. Calculate the heat of hydration of $C u S O_{4}$ to $C u S O_{4} \cdot 5 H_{2} O$