Try to rationalize the sign of ΔS∘rxn in each case.

Drag the appropriate items to their respective bins.

Part A: The answer is negative, which is consistent with a(n) in the number of moles of .
Part B: The answer is positive, which is consistent with a(n) in the number of moles of .
Part C: The change is small because the number of moles of is constant.
Part D: The answer is negative, which is consistent with a(n) in the number of moles of .
Increase
Liquid
Decrease
Solid
Gas

a) decrease, gas

b) increase, gas

c) liquid

d) increase, solid

Explanation:

Entropy refers to the degree of disorderliness of a system. If the number of moles of gas increases from left to right in a reaction, the entropy of the system increases positively.

Similarly, when the number of liquid molecules remain constant, there could only be a very little increase in entropy.

However, solids have the least entropy and the entropy of a system decreases when a system yields solid products.

explanation:

let the different atoms be x and y. each with four protons and same mass will be represented as follows.

mass number is number of protons + number of neutrons.

            and  

since, it is given that one has a negative charge while the other is neutral. therefore, there will be increase in number of protons and the atom will be represented as follows.

according to periodic table, mass number of beryllium is 9 and it has atomic number 4 so, the atoms will be and .  

the protons and neutrons will be located inside the nucleus whereas the electrons will be revolving around the nucleus.