Answer
When a rock undergoes mechanical weathering, its surface area increases. This occurs as the rock is broken down into smaller fragments, which exposes more of its surface to the surrounding environment. The increased surface area facilitates chemical weathering processes because there is a larger area available for chemical reactions to occur.
Chemical weathering relies on the interaction between rock minerals and substances in the environment, such as water and atmospheric gases. With a larger surface area, more mineral surfaces are exposed to these substances, allowing for increased contact and chemical reactions. This leads to enhanced dissolution, oxidation, hydrolysis, and other chemical processes that break down the minerals and alter the rock's composition over time. Thus, the increased surface area resulting from mechanical weathering accelerates and enhances chemical weathering processes.
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