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podryga [215]
3 years ago
7

What are some examples of endothermic and exothermic reactions?

Chemistry
2 answers:
erastova [34]3 years ago
5 0

Answer:

Endothermic

2FeSO4 -> Fe2O3 + SO2+ SO3

Iron Sulphate on heating forms

Iron Oxide, Sulphur Dioxide And Sulphur Trioxide

Exothermic

CaO + H2O -> Ca(OH)2 + Heat

Calcium Oxide combines with Water to give out heat and form Calcium Hydroxide

mihalych1998 [28]3 years ago
4 0

Answer: Endothermic examples-

Photosynthesis.

Melting ice.

Evaporating liquid water.

Exothermic examples-rusting of iron (rust steel wool with vinegar)

the thermite reaction.

reaction between water and calcium chloride.

Explanation:

endothermic process is any process which requires or absorbs energy from its surroundings, usually in the form of heat.exothermic reaction is a chemical reaction that releases energy through light or heat.

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What volume of a 0.155 M potassium hydroxide solution is required to neutralize 25.7 mL of a 0.388 M hydrobromic acid solution
vekshin1

Answer: Therefore, the volume of a 0.155 M potassium hydroxide solution  is 56.0 ml

Explanation:

Molarity of a solution is defined as the number of moles of solute dissolved per Liter of the solution.

According to the neutralization law,

n_1M_1V_1=n_2M_2V_2

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M_1 = molarity of HBr solution = 0.338 M

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V_2 = volume of KOH solution = ?

n_1 = valency of HBr = 1

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1\times 0.338\times 25.7=1\times 0.155\times V_2

V_2=56.0ml

Therefore, the volume of a 0.155 M potassium hydroxide solution  is 56.0 ml

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