Answer:
liquid phase
Explanation:
see the non-graph solution (used only formulas of the thermodynamic); the final temperature of the mixture is ~1139.701 (°K). The details are in the attachment.
Note:
Hey there!:
atomic mass:
Na = <span>22.98 a.m.u
Cl = 35.45 a.m.u
Therefore:
NaCl = 22.98 * 1 + 35.45 * 1
NaCl = 22.98 + 35.45
NaCl = 58.43 g/mol
hope this helps!</span>
Answer:
Heat is released.
Explanation:
In an exothermic reaction, the reactant(s) move into a more stable state when they form into the product(s). Thus, the excess energy is released in the form of heat.
Conversely, in an endothermic reaction, the reactant(s) move into a more unstable state. In doing so, energy is required for the chemical reaction to occur to force the reactant(s) into a less stable state. So, energy is absorbed to make the reaction occur.
Also, since energy was released, the net energy decreased. If energy was absorbed in an endothermic reaction, the net energy would increase.
Therefore, the answer is 'Heat is released'.
Answer: The concentration of excess ![[OH^-]](https://tex.z-dn.net/?f=%5BOH%5E-%5D)
in solution is 0.017 M.
Explanation:
1. 
moles of 
1 mole of 
give = 1 mole of 
Thus 0.019 moles of give = 0.019 mole of
2. moles of 
According to stoichiometry:
1 mole of 
gives = 2 moles of 
Thus 0.012 moles of give = 
moles of
As 1 mole of neutralize 1 mole of
0.019 mole of will neutralize 0.019 mole of
Thus (0.024-0.019)= 0.005 moles of will be left.
![[OH^-]=\frac{\text {moles left}}{\text {Total volume in L}}=\frac{0.005}{0.3L}=0.017M](https://tex.z-dn.net/?f=%5BOH%5E-%5D%3D%5Cfrac%7B%5Ctext%20%7Bmoles%20left%7D%7D%7B%5Ctext%20%7BTotal%20volume%20in%20L%7D%7D%3D%5Cfrac%7B0.005%7D%7B0.3L%7D%3D0.017M)
Thus molarity of in solution is 0.017 M.
