Question

are there any gas in liquids solutions for which dissolution is an endothermic process?

Answer 1

• Dissolution of a gas into a given solution will decrease the entropy of the system.
• Hence delta S(Sf-Si) = negative
• Considering the dissolution as spontaneous mixing delta g= negative
• hence delta h= delta g-T*(Delta s)
• hence depending upon temperature the process maybe exothermic or endothermic.
• But at room temperature or general temperature most of the gases show exothermic dissolution.
• You may consider non spontaneous dissolution processes also in which high temperature and lot stirring is required.
• Hence dissolution of liquid gases at room temperature can not be endothermic
• But at heigher temperatures it can be possible as stated above