Answer:
Hmm, sorry, I do not think I have learned that yet.
Yes, because there is only so much weight it can hold.
The reaction of a particular endothermic reaction whether in a negative or positive entropy change is always spontaneous. Temperature differences will be spontaneous throughout the reaction but one thing is constant, heat will always be produced within the said reaction.
I think it the answer could be a "steamy mixture of carbon dioxide and water vapor".