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Answer:
This description needs a unit describing the system of measurement.
Answer:
A.It is the same for every sample of a single substance.
Explanation:
Answer:
c. liquid
Explanation:
because the are not very close if the said very closely packed together it would have been a solid
Answer:
Absorbed, endothermic
Explanation:
Based on the heat of reaction, chemical reactions may be classified as endothermic or exothermic.
In an endothermic reaction, heat is absorbed from the surrounding. As heat is absorbed from the surrounding, the reaction vessel feels cool when touched.
On the other hand, in an exothermic reaction, heat is given out by the system to the surrounding and the reaction vessel feels hot when touched.
Hence the reaction is endothermic and energy is absorbed during the reaction.
