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Solnce55 [7]
3 years ago
11

If the heat of reaction is negative, the reaction is _____. Select one:

Chemistry
2 answers:
Vitek1552 [10]3 years ago
7 0
Exothermic reaction
natta225 [31]3 years ago
6 0

Answer: Option (b) is the correct answer.

Explanation:

A chemical reaction where heat energy is absorbed by the reactant molecules is known as an endothermic reaction.  

For example, A + B + Heat \rightarrow AB

The value of \Delta H = +ve for an endothermic reaction.

In an endothermic reaction, heat being absorbed is utilized to break the bonds. Therefore, temperature of the system decreases.  

On the other hand, a chemical reaction in which heat energy is released by the reactant molecules is known as an exothermic reaction.  

The value of \Delta H = -ve for an exothermic reaction.

Thus, we can conclude that if the heat of reaction is negative, the reaction is exothermic.

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Charcoal with a carbon-14 activity of 0.60 compared to new wood has less than 5,730 years.

<h3>What is a radioactive isotope?</h3>

A radioactive isotope is an element in nature that emit radioactivity in a given period of time (e.g., the half-life for C14 is equal to 5,730 years).

Radioactive dating is a technique to measure the age of an element by measuring its radioactive activity.

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A gas is enclosed in a cylinder fitted with a piston. The volume of the gas is 2.00 L at 0.524 atm. The piston is moved to incre
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