Does the following reaction show an increase or decrease in entropy? N2(g)  +  3 H2(g)  --->  2 NH3(g)  

Answer 1

A reduction of entropy.

Entropy is associated with the degree of disorder, or number of degrees of freedom. In the reaction #N_2 + 3H_2 --> 2NH_3# we start with four moles of gaseous reactants! and end with two moles of gaseous products, which is less disordered.

It's generally the case that a reaction with a lower concentration of gaseous products than gaseous reactants will result in a decrease in entropy, and vice versa. In this case, it's fortunate that the enthalpy change is exothermic, as otherwise ammonia production from nitrogen and hydrogen would be impossible.

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Answer 2

The given reaction results in an increase in entropy.

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Answer from HIX Tutor

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

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