Chemistry All the enthalpy changes are________________? Options:A. NegativeB. PositiveC. May or may not be A or BD. noneView AnswerC. May or may not be A or B Continue Reading Previous: Equal masses of methane and oxygen are mixed in empty container at 250?(C) The fraction of total pressure exerted by oxygen is___________________?Next: Estimation of amounts of different components in a sample is________________?