Why would a thunderstorm move slowly?

Very generally the snow storms occur over a much larger area than a thunderstorm and generally move much slower this is why it moves slow. 

Hi; /c

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.