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Nuetrik [128]
3 years ago
14

What is the predicted change in the boiling point of water when 4.00 g of barium chloride is dissolved in 2.00 kg of water?

Chemistry
1 answer:
laiz [17]3 years ago
5 0

BaCl2 has molar mass of 208.23 g/mol

Boiling point of elevation can be calculated using the formula:

ΔTb = iKbm

Where:

i = van’t Hoff factor  (This is 3 for BaCl2 since it dissociates to 3 ions)

Kb = molal boiling point constant for water (0.51 °C/m)

m = molality of solution

Substituting the values into the equation:

ΔTb = 3*0.51*(4/(2*208.23))

ΔTb = 0.0147°C or 0.015°C

 

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Answer:

The answer to your question is P2 = 1.52 atm

Explanation:

Data

Volume 1 = V1 = 4.54 l

Pressure 1 = P1 = 1.65 atm

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Volume 2= V2 = 5.33 l

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Temperature 2 = 103°C

Process

1.- Convert temperature to °K

Temperature 1 = 75 + 273 = 348°K

Temperature 2 = 103 + 273 = 376°K

2.- Use the combine gas law to find the final pressure

               P1V1/T1 = P2V2/T2

-Solve for P2

               P2 = P1V1T2 / T1V2

-Substitution

               P2 = (1.65 x 4.54 x 376) / (348 x 5.33)

-Simplification

               P2 = 2816.62 / 1854.84

-Result

              P2 = 1.52 atm

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