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Vinvika [58]
3 years ago
8

Match the molecules to the correct state of matter

Chemistry
2 answers:
loris [4]3 years ago
5 0

Answer:

1 b. solid

2 a. liquid

3 c. gas

Vladimir79 [104]3 years ago
4 0

Answer:

1. solid, 2.liquid, 3.gas.

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A sample of 10.6 g of KNO3 was dissolved in 251.0 g of water at 25 oC in a calorimeter. The final temperature of the solution wa
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Answer:

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The heat of solution is the change in heat when the KNO3 dissolves in water:

KNO3(aq) → K+(aq) + NO3-(aq)

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To solve the molar heat we need to find the moles of KNO3 dissolved and the change in heat as follows:

<em>Moles KNO3 -Molar mass: 101.1032g/mol-</em>

10.6g * (1mol/101.1032g) = 0.1048 moles KNO3

<em>Change in heat:</em>

q = m*S*ΔT

<em>Where q is heat in J,</em>

<em>m is the mass of the solution: 10.6g + 251.0g = 261.6g</em>

S is specififc heat of solution: 4.184J/g°C -Assuming is the same than pure water-

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q = 261.6g*4.184J/g°C*3.5°C

q = 3830.87J

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36554J/mol =

<h3>36.55kJ/mol</h3>

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