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The salt copper(II) sulfate dissolves in water according to the reaction: CuSO4(s) ----->Cu2+(aq) + SO42-(aq) (a)...

The salt copper(II) sulfate dissolves in water according to the reaction: CuSO4(s) ----->Cu2+(aq) + SO42-(aq)

(a) Calculate the standard enthalpy change ΔH° for this reaction, using the following data: CuSO4(s) = -771.4 kJ mol-1 Cu2+(aq) = 64.8 kJ mol-1 SO42-(aq) = -909.3 kJ mol-1

______kJ

(b) Calculate the temperature reached by the solution formed when 18.3 g of CuSO4 is dissolved in 0.195 L of water at 24.2 °C. Approximate the heat capacity of the solution by the heat capacity of 195 g of pure water (specific heat capacity = 4.18 J g-1 °C-1), ignoring the mass of the salt.

_____________ °C

(c) Heats of reaction find practical application in hot packs or cold packs. Would this dissolution reaction be appropriate for the preparation of a hot pack or a cold pack?

_________hot pack/cold pack

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Answer #1

@ GuS04 (s) ___→ Renctans 几0 (B)巨防al by ef l disso Lt.cny 18.31 Gle -一8.381 1叮:1-8381 T dcter 2133 3 133 6 Cc) sicne the dissolution of copper sulphate in water is exothermic , temperature rises , it can be used as hot pack.

As per the requirement of hot pack temeprature the mass of cuso4 and water may be changed

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