Marcela dissolves 80.0 g of ammonium nitrate in 50.0 ml of water at room temperature and notes that the temperature of the solution decreases by 5.0°c.
which correctly designates the signs of changes of g, s and h for this reaction? by changes the symbol is triangle.

a. h> 0, s> 0 , g< 0
b. h< 0, s> 0 , g< 0
c. h> 0, s> 0 , g> 0
d. h< 0, s< 0 , g> 0

The correct answer is A

Explanation:

On addition of the ammonium nitrate to 50 ml of water the temperature decreases which means that reaction between the ammonium nitrate and water is an endothermic reaction.The value of is positive for an endothermic reactions.

Entropy is a degree of randomness of the system.

On addition of the ammonium nitrate to water ammonium nitrate break down into ions which means that entropy is increased.

(Gibb's free energy)

Since, ammonium nitrate is getting dissolved in water which means that this reaction is spontaneous and of spontaneous reaction is negative that is:

A. H>0, S>0 , G<0

Explanation:

Hello,

Based on the noticed change in temperature, one can identify that the enthalpy for this dissolution process is positive as long as the temperature decreases, so Δ.

Now, due to the fact of the bonds breaking down, one establishes that the entropy increases in a positive way, thus Δ.

Finally, by considering that the ammonium nitrate is being dissolved into the water a spontaneous process is carried out, implying that the change in Gibbs free energy turns negative, Δ, so one sum up that the answer is A.

Best regards.

mechanics (greek   is that area of science concerned with the behaviour of physical bodies when subjected to forces or displacements, and the subsequent effects of the bodies on their environment. the scientific discipline has its origins in ancient greece with the writings of aristotle and archimedes[1][2][3] (see history of classical mechanics and timeline of classical mechanics). during the early modern period, scientists such as galileo, kepler, and newton laid the foundation for what is now known as classical mechanics. it is a branch of classical physics that deals with particles that are either at rest or are moving with velocities significantly less than the speed of light. it can also be defined as a branch of science which deals with the motion of and forces on objects. the field is yet less widely understood in terms of quantum theory.

explanation: