When 105 G KBr(s) Dissolves in 125 G of Water at at 24.2

question 146

Multiple Choice

When 10.5 g KBr(s) dissolves in 125 g of water at 24.2 $\degree$ C, the final temperature of the solution comes to 21.1 $\degree$ C.Assume that the heat capacity of the solution is roughly 4.18 J/(g . $\degree$ C) .What is the molar enthalpy of a solution of potassium bromide (119.00 g/mol) ?

• A)(+19.9 kJ/mol)
• B)(+167 kJ/mol)
• C)(+1.76 kJ/mol)
• D)(+67.6 kJ/mol)
• E)(+18.4 kJ/mol)

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