What are some observable indications that a chemical reaction has occurred?
1 answer:
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Mass of the water is 2.63 g.
<u>Explanation:</u>
Mass of the water, m = ? g
Temperature, ΔT = 15 °C
Heat absorbed, q = 165 J
Specific heat capacity, c = 4.18 J / g °C
q = m × c × ΔT
Now, we have to find the mass of the water by rewriting the above equation as,
m =
Now Plugin the above values in the equation as,
m =
= 2.63 g
So the mass of the water is found as 2.63 g.
Answer:
a. ΔΗ > 0, solution feels cold
Explanation:
Hello,
In this case, endothermic process are those in which we can find that the products have more energy than the reactants, therefore energy is absorbed, for which the following equation:
Must be greater than 0 (positive) thereby, for a solution process we find that the solution feels cold, in such a way, answer is a. ΔΗ > 0, solution feels cold.
Regards.