Chemistry Help- Enthalpy Change?

Posted on 2015-10-19 06:36:00 in Chemistry by KATIE

A 100.0-mL sample of 1.00 M NaOH is mixed with 50.0 mL of 1.00 M H2SO4 in a large styrofoam coffee cup; the cup is fitted with a lid through which passes a calibrated thermometer. The temperature of each solution before mixing is 23.7 Celsius. After adding the NaOH solution to the coffee cup and stirring the mixed solutions with the thermometer, the maximum temperature measured is 30.5 Celsius. Assume that the density of the mixed solutions is 1.00 g/mL, that the specific heat of the mixed solutions is 4.18 J/g*C, and that no heat is lost to the surroundings.

a) Write a balanced chemical equation for the reaction that takes place in the styrofoam cup.

b) is any NaOH or H2SO4 left in the styrofoam cup when the reaction is over? Yes or No.

c) Calculate the enthalpy change per mole of H2SO4 in the reaction.
Answer in kJ/mol?

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