Describe what the greenhouse effect is and how it is caused on a molecular level.

1 answer:

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The greenhouse effect is the process by the temperature of surface of earth increases because of earth's atmosphere.

Mechanism:

Sun emits a broad band of visible light spanning from red to blue colour. In addition to this, it emits UV and IR radiation. Infrared radiations have wavelength longer than IR, while UV ray have wavelength shorter than visible light. Each of these radiations are received on the earth's surface. On receiving radiation, part of it is absorbed by earth and remaining is reflected back. Generally, light of longer wavelength (IR) is reflected to larger extend as compared to shorter wavelength. Due to this, air present in atmosphere gets heated up. It must be noted that, molecule like CO2, which is present in air absorbs light from both direct and reflected fraction of light. This phenomenon is referred as green house effect. Molecule which absorb long wavelength light (IR) are present in atmosphere due to human activities. Hence, green house effect is often considered to arise because of human activities of altering the composition of air.

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The equilibrium constant, Kc, for the reaction H2 (g) + I2 (g) ⇄ 2HI (g) at 425°C is 54.8. A reaction vessel contains 0.0890 M H

Mars2501 [29]

Answer: The reaction is not at equilibrium and will proceed to make more products to reach equilibrium.

Explanation:

Equilibrium constant is defined as the ratio of concentration of products to the concentration of reactants each raised to the power their stoichiometric ratios. It is expressed as $K_{eq}$

K is the constant of a certain reaction when it is in equilibrium, while Q is the reaction quotient of activities of products and reactants at any stage other than equilibrium of a reaction.

For the given chemical reaction:

$H_2(g)+I_2(g)\rightarrow 2HI(g)$