Respuesta :
Answer: b. [tex]\Delta H_{soln}[/tex] is positive and [tex]\Delta S_{soln}[/tex] is positive.
Explanation:-
As the temperature of the pack drops, the energy has been absorbed from the pack for dissolution of [tex]NH_4NO_3[/tex] in water. Thus as the energy has been absorbed in the reaction, the reaction is endothermic and the change in enthalpy i.e. [tex]\Delta H_{soln}[/tex] is positive.
The entropy is the measure of degree of randomness. The entropy increases when the randomness increases and the entropy decreases when the randomness decreases. When a substance dissolves in water, it dissociate into ions and hence the randomness increases thus the change in entropy i.e. [tex]\Delta S_{soln}[/tex] is positive.
[tex]NH_4NO_3\rightarrow NH_4^++NO_3^-[/tex]
The dissolving of[tex]NH_4NO_3[/tex] in water is ΔH sol n is positive and ΔS sol n is positive.
The correct option is B.
What is temperature?
A temperature is a unit of measurement for hotness or coldness that can be stated in a variety of ways, including Fahrenheit and Celsius.
The energy has been absorbed from the pack for dissolving in water as the temperature of the pack declines.
The reaction is thus endothermic, and the change in enthalpy, i.e., is positive, because the energy has been absorbed in the reaction.
The entropy is a measure of how random something is. When the unpredictability rises, the entropy increases, and when the randomness reduces, the entropy falls.
Thus, When a chemical dissolves in water, it dissociates into ions, increasing the unpredictability and resulting in a positive change in entropy.
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