In areas where freezing and thawing occur frequently, rocks weather rapidly because of the of freezing water. a. evaporation c. leaching b. expansion d. oxidation

b. expansion

Explanation:

The rapid freezing and thawing will be responsible for mechanical weathering of the rocks by the process of frost wedging. In this condition the temperature outside the rock causes the disintegration of the rock.

In cold temperature the water inside the rock get freezed and when the temperature outside the rock becomes normal the water attains it's liquid form this is called as thawing.

On freezing the surface area of the ice expands inside the rock which leads to the disintegration of the rock structure from inside. Thus results in weathering.

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explanation:

the enthalpy of formation of water is given as -285.8kj/mol, which states that the enthalpy of formation is negative.

negative enthalpy of formation indicates that the heat is released during the reaction process. the heat is released from reaction to the surroundings the enthalpy is expressed with a negative sign with the energy given out in the reaction process.

the formation of water takes place by giving out heat which is -285.8 kj/mol.