甲醇质子交换膜燃料电池中将甲醇蒸气转化为氢气的两种反应原理是:
① CH3OH(g)+H2O(g)===CO2(g)+3H2(g) ΔH=+49.0 kJ/mol
② CH3OH(g)+1/2O2(g)===CO2(g)+2H2(g) ΔH=-192.9 kJ/mol
则下列说法不正确的是( )
A.CH3OH的燃烧热为192. 9 kJ/mol |
B.CH3OH转变成H2的过程不一定要吸收能量 |
C.根据①②推知反应:H2O(g)== H2(g) +1/2O2(g) ΔH=+241.9 kJ/mol |
D.根据②推知反应:CH3OH(l)+1/2O2(g)===CO2(g)+2H2(g)的ΔH>-192.9 kJ/mol |