Question

A sample of iron weighing 6.50 g (specific heat = 0.449 J/goC) is colled from 25.3oC to -68.7oC. How much heat was transferred? (Be sure to include the sign).

Answer 1

Change in temp $= -68.7-25.3=-94degrees$

Heat transferred $=cm∆T$

Heat transferred $=0.449×6.50×(-94)=-274.339$ j