H2O has a mc021-1.jpgHvap = 40.7 kJ/mol. What is the quantity of heat that is released when 27.9 g of H2O condenses?A)60.00 kJ
B)61.05 kJ
C)63.09 kJ
D)68.60 kJ

Answers

Answer 1

Answer:

Energy released from changing the phase of a substance from the gas phase to liquid phase can be calculated by using the specific latent heat of vaporization. The heat of fusion of water at 0 degrees Celsius is 40.7 kJ/mol. Calculation are as follows:

Energy = 27.9 g (1 mol / 18.02 g) x 40.7 kJ/mol

Energy = 63.09 kJ

Answer 2

Answer:

Answer:

C- 63.09 kJ

Explanation:

I have several degrees

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Answers

Answer:

Explanation:

pom, add

On the pH scale, a solution with a pH of 7 would be classified as which of the following? A weak acid, weak base, neutral, or pure H2O?

Answers

It would be neutral.

It would be neutral ,but pure H2O is neutral in itself so it could be either of them

Which of the following tends to form a cation (positive ion) with a charge of 2+?a. Na
b. O
c. He
d. Mg

Answers

This has all of the charges above the columns. Hopefully it helps!

When should you avoid looking directly at magnesium burning?

Answers

Answer:

Magnesium also reacts with nitrogen in the air to produce some magnesium nitride (Mg3N2). Safety: Do not look directly at the burning magnesium due to the intensity of the light. A dry-powder fire extinguisher should be available. Disposal: Once cooled the solid magnesium products can be thrown in the trash.

Explanation:

Which two gases make up most of the atmosphere?