Work Step by Step
From the conservation of energy principle: $13.8\ g\times C \times (98.8-27.1)=45.0\ g\times 4.184\ J/g.K\times(27.1-25.0)$ $395.39=989.46\times C$ $C=0.40\ J/g.K$
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.