Which reaction would cause a decrease in entropy?
A. 2NOCI(9) + 2NO(g) + Cl2(9)
B. 2NH3(9) ► N2(g) + 3H2(9)
C. 2CC14(9) + O2(g) → 2C0C12(g) + 2Cl2(9)
D. CO(g) + 3H2(g) → CH4(9) + H20(9)

Entropy in thermodynamic refers to the degrees that represent the absence of system's thermal energy that is not available to perform mechanical work, which is the degree of disorder or randomness in the system.

Therefore, 2NOCI(9) + 2NO(g) + Cl2(9) shows ddecrease in entropy because it shows degree of disorderliness is low

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Which reaction would cause a decrease in entropy? A. 2NOCI(9) + 2NO(g) + Cl2(9) B. 2NH3(9) ► N2(g) + 3H2(9) C. 2CC14(9) + O2(g) → 2C0C12(g) + 2Cl2(9) D. CO(g) + 3H2(g) → CH4(9) + H20(9)

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What is Entropy?

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Which reaction would cause a decrease in entropy?
A. 2NOCI(9) + 2NO(g) + Cl2(9)
B. 2NH3(9) ► N2(g) + 3H2(9)
C. 2CC14(9) + O2(g) → 2C0C12(g) + 2Cl2(9)
D. CO(g) + 3H2(g) → CH4(9) + H20(9)