H2 burning in O2 to form H2O (l) is an example of a system where the entropy of the universe decreases.

H2 is not flammable.

A. True

B. False

B. False

Explanation:

the reaction is

H₂0 + O₂ = H₂O

as addition of oxygen means burning in the system which means heating or energy is necessary for the reactants. SO the reaction is spontaneous and exothermic.

As according to second law of thermodynamics

the change in enthalpy is greater than or equal to zero when the reaction is spontaneous, so enthalpy will increase in the above reaction.

H2 burning in O2 to form H2O (l) is an example of a system where the entropy of the universe increases.