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The salt ammonium perchlorate dissolves in water according to the reaction: NH4ClO4(s) NH4+(aq) + ClO4-(aq) (a)...

The salt ammonium perchlorate dissolves in water according to the reaction: NH4ClO4(s) NH4+(aq) + ClO4-(aq)

(a) Calculate the standard enthalpy change ΔH° for this reaction, using the following data: NH4ClO4(s) = -295.3 kJ mol-1 NH4+(aq) = -132.5 kJ mol-1 ClO4-(aq) = -129.3 kJ mol-1 kJ

(b) Calculate the temperature reached by the solution formed when 33.9 g of NH4ClO4 is dissolved in 0.196 L of water at 23.4 °C. Approximate the heat capacity of the solution by the heat capacity of 196 g of pure water (specific heat capacity = 4.18 J g-1 °C-1), ignoring the mass of the salt.

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Answer #1


OH = stif products - shj reacteuks - (-132.5-129.3) - (-295-3) OH = 33.5 67 Imol moles of NH C104 = 33.7117.489 = 0.2885 mol

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