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MrMuchimi
3 years ago
9

A calorimeter contains 251 g of water at 24.3 C.The temperature of the water decreases to 18.5 C when 12.5 g of potassium nitrat

e is dissolved in water. Is dissolving potassium nitrate in water endothermic or exothermic
Chemistry
1 answer:
vova2212 [387]3 years ago
8 0

Answer:

Endothermic  

Explanation:

The temperature of the water decreased.

The water lost heat.

The heat must have gone into getting the KNO₃ into solution.

So, the dissolving of KNO₃ in water is endothermic.

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Read 2 more answers
General Chemistry fourth edition by McQuarrie, Rock, and Gallogly. University Science Books presented by Macmillan Learning.
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Answer:

3.07 Cal/g

Explanation:

Step 1: Calculate the heat absorbed by the calorimeter

We will use the following expression.

Q = C × ΔT

where,

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  • ΔT: temperature change (2.29 °C)

Q = 37.60 kJ/°C × 2.29 °C = 86.1 kJ

According to the law of conservation of energy, the heat released by the candy has the same magnitude as the heat absorbed by the calorimeter.

Step 2: Convert 86.1 kJ to Cal

We will use the conversion factor 1 Cal = 4.186 kJ.

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3 0
3 years ago
Plz I need help is the 2nd time I post this
pychu [463]

Answer:

2--->C

6---->E

3---->D

4--->A

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1---->F

Explanation:

I think so, sorry if its wrong.

8 0
2 years ago
Which of the following bonds is the most polar in nature:
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