A 1.800-g sample of phenol (C₆H₅OH) was burned in a bomb calorimeter whose total heat capacity is 11.66 kJ/°C. The temperature of the calorimeter plus contents increased from 21.36 to 26.37 °C. a. Write a balanced chemical equation for the bomb calorimeter reaction.

Balance each chemical equation. a. Na₂S(aq) + Cu(NO₃)₂(aq) → NaNO₃(aq) + CuS(s) b. N₂H₄(l) → NH₃(g) + N₂(g) c. HCl(aq) + O₂(g) → H₂O(l) + Cl₂(g) d. FeS(s) + HCl(aq) → FeCl₂(aq) + H₂S(g)