IDNStudy.com, kung saan ang iyong mga tanong ay natutugunan ng mga maaasahang sagot. Magtanong at makatanggap ng maaasahang sagot mula sa aming dedikadong komunidad ng mga eksperto.

1. If the coefficient in an equation are double, ∆H must be double
Ca(s)+ C(graphite)+3/2 O2(g) ->CaCO3(s) ∆H=-1206.9 kJ/mol

2. If reverse reaction and the opposite sign of ∆H
4NH3(g) + 5O2(g) -> 4NO(g) + 6H2O (1) ∆H =- 904 kJ/mol

3. If reverse reaction and the coefficient in an equation is triple, ∆H must be triple with opposite sign
C6H12O6(s) -> C2H5O(1) + 2CO2 (g) ∆H =-67.9 kJ/mol​