Calculation for Q or heat or energy if the sample Cadmium metal.

Specific heat capacity value for the sample is $0\mathrm{.}23$ j$/$g K

Mass of sample : $58\mathrm{.}953$g

Volume of water at room temp: $100$ml

Mass of water at room temp: $100$g

temp of water $($room temp$)22$ degrees

Temp of hot water :$100$ degrees

Steady temp after sample placed in water : $25$ degrees.

What are the possible sources of errors?

I do not understand how to do this problem.