Work Step by Step
From the definitions of latent heat and heat capacity: $25.0\ mL\times 0.80\ g/mL\times [1.74\ J/g.K\times (19.9- 5.5)\ K+127\ J/g]=3.04\ kJ$
You can help us out by revising, improving and updating this answer.Update this answer
After you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.