Which of these is a major drawback of using fuel cells in a car? a lack of hydrogen filling stations
a drop in reliance on petroleum products
an increase in water vapor into the atmosphere
an increase in the use of rechargeable batteries

A lack of hydrogen filling stations

Cis the answer ur welcome if i get it wrong u don't have to me

Answerδh > 0explanationc₆h₆  (s)  → c₆h₆ (l)if you are changing it from a solid to a liquid, you are pretty much melting the solid. this requires heat energy. therefore, the reaction is endothermic (takes in energy); the system enthalpy increases as the reaction proceeds: δh > 0.