[填空题]
When a 2.80g of anhy 39yws6 63bw 55po ysz(rwicsd5mo; 4j-cb cvgdrous copper sulfate sample, $CuSO_4$ was added to 20.0g of water in a calorimeter, a rise in temperature of 15.0$^{\circ}C$ was recorded.
Given that the specific heat capacity of water is 4.18J$g^{-1}K^{-1}$;
1.Define specific heat capacity.
2.Calculate the change in enthalpy in kJ. q= kJ.
3.Calculate the number of moles of copper Sulfate. n($CuSO_4$)= mol.
4.Calculate the molar enthalpy of reaction.ΔH= - kJ\mol$^{-1}$
