Asked by Kelly
A 3.0g sample of NaCl is added to a Styrofoam cup of water, and the change in water temperature is 6.5∘C . The heat of solution of NaCl is 3.76 kJ/mol.
What is the mass (in g) of water in the Styrofoam cup?
What is the mass (in g) of water in the Styrofoam cup?
Answers
Answered by
DrBob222
How much heat, q, is evolved ? That's
q = 3.76 kJ/mol x (3.0g NaCl/58.46 g NaCl) = ?. Then
q = mass H2O x specific heat H2O x delta T.
Substitute and solve for mass H2O
q = 3.76 kJ/mol x (3.0g NaCl/58.46 g NaCl) = ?. Then
q = mass H2O x specific heat H2O x delta T.
Substitute and solve for mass H2O
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