Answer: C. The sign of the enthalpy of the reaction reverses.
Explanation: Enthalpy of a reaction is the net heat absorbed or released during a chemical reaction.It is represented by . It is negative for exothermic reactions in which heat is released and is positive for endothermic reactions in which heat is absorbed.
When a chemical reaction is reversed the heat of the reaction changes its sign.
The decomposition of calcium carbonate is an endothermic reaction as heat is required to break the bonds and thus energy is absorbed.
When the reaction is reversed, the reaction becomes exothermic as now bonds are getting formed and energy is released.
Answer:
i think air pollution
Explanation:
of course the other two pollutions are harmful but with air pollution the harmful chemicals are going straight into your respiratory system. this is why people in asia wear masks, there’s so many harmful chemicals in the air from the factories.
<span>chloroplasts</span>
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<span>Chloroplast is chloroplast filled organelle that is found in plant cells and some green algae. Chloroplast is a kind of plastid- a round oval disk-shaped body, that is involved in the synthesis and storage of food stuffs.</span>
Chloroplasts are distinguished from other types of plastids by their green color which results from the presence of two pigments namely chlorophyll A and chlorophyll B.
A function of these pigments is to absorb light energy in plants for powering the process of photosynthesis.
The correct anwser should be speed
:)