已知3.6 g碳在6.4 g氧气中燃烧,至反应物耗尽.共放出x kJ热量.已知单
题型:选择题
问题:
已知3.6 g碳在6.4 g氧气中燃烧,至反应物耗尽.共放出x kJ热量.已知单质碳的燃烧热为y kJ·mol-1,则1 mol C与O2反应生成CO的反应焓变△H为 ( )
A.-y kJ·mol-1
B.-(5x-0.5y)kJ·mol-1
C.-(10x-y)kJ·mol-1
D.(10x-y)kJ·mol-1
已知3.6 g碳在6.4 g氧气中燃烧,至反应物耗尽.共放出x kJ热量.已知单质碳的燃烧热为y kJ·mol-1,则1 mol C与O2反应生成CO的反应焓变△H为 ( )
A.-y kJ·mol-1
B.-(5x-0.5y)kJ·mol-1
C.-(10x-y)kJ·mol-1
D.(10x-y)kJ·mol-1