Question

What is the standard molar entropy for calcium hydroxide, Ca(OH)2? Express your answer in units of...

What is the standard molar entropy for calcium hydroxide, Ca(OH)2?

Express your answer in units of J/mol*K

What is the entropy of 4.06 g of Ca(OH)2?

Express your answer in units of J/K

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Answer #1

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The standard molar entropy for calcium hydroxide, Ca(OH)2 = 83.4 J/(mol K).

given-

4.06 g of Ca(OH)2

molecular weight of Ca(OH)2- 40+32+2 = 74 g/mol

moles of Ca(OH)2= 4.06/74

                         = 0.05 moles

Hence entropy of 4.06 g of Ca(OH)2 = 0.05 mol X 83.4 J/(mol K).

                                                    = 4.17 J/K

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