已知下列热化学方程式:
(1)CH3COOH(l) + 2O2(g) ="=" 2CO2(g) + 2H2O(l) △H1=" -870.3" kJ·mol-1
(2)C(s) + O2(g) ="=" CO2(g) △H2=" -393.5" kJ·mol-1
(3)H2(g) + 1/2 O2(g) ="=" H2O(l) △H3= -285.8kJ·mol-1
则反应:2C(s) + 2H2(g) + O2(g) ="=" CH3COOH(l)的反应热为( )
A.-488.3 kJ·mol-1 | B.-244.15 kJ·mol-1 | C.+488.3 kJ·mol-1 | D.+244.15 kJ·mol-1 |