A element mixture (key word: mixture) due to the mixture containing 2 different types of elements it can be said that it’s highly likely that the mixture was not a compound but instead of a mixture due to mixture meaning more than 1 material. Hopes this help!
Answer:
No heat is released.
Explanation:
A substance absorbs heat when it melts.
The formula for the heat absorbed is

Data:
m = 10 g
\Delta_{fus) H=\text{334 J/g}
Calculations:

Different amount of species in an area.
Answer:
A
Explanation:
Increasing the the temperature would favour the endothermic reaction which is the forward direction however increasing the pressure would make the reaction try to counteract this change by favouring the reaction that would create more products so the equilibrium will shift left instead of right.
Hope this helps.