reaction included:
1. calcium + hydrochloric acid
2. calcium carbonate + hydrochloric acid
更新1:
If I want to find the standard enthalpy change of the calcium carbonate. 1. Heat released = m x c x ( temperature change). Is m represents mass of HCl? 2. standard enthalpy change = heat released / mol. Is mol represents the no. of moles of HCl?