negative
The formula for the decomposition for ammonia would be 2NH3 --> N2 + 3H2
2NH3 + 2NA = 3H2 + NA3N2
To determine which reaction has a decrease in entropy, we look at the change in the number of gas molecules. A decrease in entropy typically occurs when the number of gas molecules decreases from reactants to products. Among the reactions provided, the formation of ( \text{N}_2\text{O}_4(g) ) from ( 2\text{NO}_2(g) ) results in a decrease in the total number of gas molecules (from 2 moles of ( \text{NO}_2 ) to 1 mole of ( \text{N}_2\text{O}_4 )), indicating a decrease in entropy.
2NH3 is the product of N2+3H2
The formula for the synthesis of ammonia from diatomic nitrogen and hydrogen is: N2+3H2-->2NH3
The reaction N2 (g) + 3H2 (g) → 2NH3 (g) shows an increase in entropy because it involves an increase in the number of gaseous molecules from 2 to 4. Therefore, the entropy change for this reaction is positive.
Reaction D would result in decreased entropy, as the solid reactant (MgCl2) is breaking into ions in solution, which typically decreases entropy. The other reactions involve gases as reactants or products, which generally increase entropy due to higher degrees of freedom in gaseous states.
n2(g)+3H2(g)>2NH3(g)
The formula for the decomposition for ammonia would be 2NH3 --> N2 + 3H2
There are 2 nitrogen atoms in 2NH3.
2NH3 + 2NA = 3H2 + NA3N2
To determine which reaction has a decrease in entropy, we look at the change in the number of gas molecules. A decrease in entropy typically occurs when the number of gas molecules decreases from reactants to products. Among the reactions provided, the formation of ( \text{N}_2\text{O}_4(g) ) from ( 2\text{NO}_2(g) ) results in a decrease in the total number of gas molecules (from 2 moles of ( \text{NO}_2 ) to 1 mole of ( \text{N}_2\text{O}_4 )), indicating a decrease in entropy.
The reaction is the decomposition of ammonia gas into nitrogen gas and hydrogen gas. The reaction is endothermic, as indicated by the positive value of ΔH (160.58 kJ). This means that heat is absorbed from the surroundings for the reaction to occur.
An example of a reaction that would result in decreased entropy is a dehydration reaction.
The balanced equation for this reaction is: N2(g) + 3H2(g) → 2NH3(g).
The balanced symbol equation for the formation of ammonia is: N2 + 3H2 → 2NH3
The bond of reactants that is broken in 2NH3 is the nitrogen-hydrogen (N-H) bond.