Answer: B. endergonic, not spontaneous
Explanation:
Endergonic reactions are defined as the reactions in which energy of the product is greater than the energy of the reactants. The total energy is absorbed in the form of heat and 
for the reaction comes out to be positive.
The Gibbs equation is:
= Gibb's free energy change
= enthalpy change
T = temperature
= entropy change
A reaction is non spontaneous when = Gibb's free energy change is positive
Thus the reaction has to be endergonic.
4.5 x 10-4
An easy trick is to count the zeros.
From another answer, it is most likely E. Horizon. Hope this helps!
Through Air sounds travels approximately 343 meters/second. Why the difference? Because the closer together the molecules in a substance are, the faster sound will travel through that medium.
