What chemical weathering process occurs when chemicals combine with water in a chemical reaction to change the physical properties of the rock?

Answer 1

Since igneous rocks form at high temperatures, and under pressure conditions ranging from one to several atmospheres. However, the conditions at the Earth's surface are somewhat different than the conditions at which most rocks and minerals form. Therefore, the materials are no longer at equilibrium when they are exposed to surface conditions. Under these conditions, there is a tendency for all ordered systems to seek lower levels of energy or order. This is all done through weathering.

Weathering - the disintegration and decomposition of rock at or near the surface of the earth. It affects the rocks in place and no transport is involved. This distinguishes weathering from erosion.

Mechanical/physical weathering - physical disintegration of a rock into smaller fragments, each with the same properties as the original. Occurs mainly by temperature and pressure changes.

Chemical weathering - process by which the internal structure of a mineral is altered by the addition or removal of elements. Change in phase (mineral type) and composition are due to the action of chemical agents. Chemical weathering is dependent on available surface for reaction temperature and presence of chemically active fluids. Smaller particle sizes weather by chemical means more rapidly than large particles due to an increase of surface area. Look at the diagram below and you will see that as the particles get smaller, the total surface area available for chemical weathering increases.

Answer 2

Chemical weathering breaks down rock by altering the chemistry of the surface of the rock, most commonly. Many of a rock's constituent minerals are affected, and decomposed by chemical reactions to acidic fluids, like acidic rainfall and groundwater.

Answer 3

chemical weathering can change a rock by the water freezing inside the roclk and the crease of the rock breaking by the frozen water inside of it.

Answer 4

Its either

Leaching

Oxidation

and

Hydration

Answer 5

hydration

Chemical weathering / hydration (the process which creates clay minerals from silicates).

Answer 6

This is a weathering by chemical reactions.

Answer 7

Chemical weathering; solution, hydration and hydrolysis, they all deal with reactions of water on salts, minerals and chemicals in rocks.

Answer 8

leaching

hydration A+

Answer 9

chemical!

Answer 10

hydration