# chemistry

posted by .

How much energy (in kilojoules) is released when 12.3g of steam at 121.5degree C is condensed to give liquid water at 64.5 degree C? The heat of vaporization of liquid water is 40.67 kj/mol, and the molar heat capacity is 75.3 J/(K mol) for the liquid and 33.6 J/(K mol) for the vapor

• chemistry -

The easiest way to do this is to do it in steps.
q1 = heat to move steam from 121.5 to 100.
q1 = mass x specific heat steam x delta T.

q2 = heat to condense steam at 100 C to liquid water at 100.
q2 = mass x heat vaporization.

q3 = heat to move liquid water at 100 C to liquid water at 64.5 C.
q3 = mass x specific heat water x delta T.

Total heat removed = q1 + q2 + q3.

• chemistry -

34.1kJ

## Similar Questions

1. ### chemistry

How much energy (in kilojoules) is released when 12.3 of steam at 121.5 is condensed to give liquid water at 64.5?
2. ### chemistry

How much energy (in kilojoules) is released when 12.3g of steam at 121.5 degree C is condensed to give liquid water at 64.5 degree C?
3. ### chemistry

How much energy (in kilojoules) is released when 12.3g of steam at 121.5 degree C is condensed to give liquid water at 64.5 degree C?
4. ### Chemistry

How much energy (in kilojoules) is released when 12.8 g of steam at 130.0 C is condensed to give liquid water at 73.5 C?
5. ### Chemistry

The heat capacity of liquid water is 4.18 J/g·°C and the heat of vaporization is 40.7 kJ/mol. How many kilojoules of heat must be provided to convert 1.00 g of liquid water at 67°C into 1.00 g of steam at 100°C?
6. ### chemistry

How much energy (in kJ) is released when 16.4 g of steam at 121.5 degrees C is condensed to give liquid water at 60.5 degrees C?
7. ### Chemistry

22.) The molar heats of fusion and vaporization for water are 6.02 kJ/mol and 40.6 kJ/mol, respectively, and the specific heat capacity of liquid water is 4.18 J/gC. (1) What quantity of heat is required to melt 25.0 g of ice at 0C?
8. ### Chem URGENT

How much energy (in kilojoules) is released when 13.3g of steam at 114.5∘C is condensed to give liquid water at 67.0∘C?
9. ### Chemistry

How much energy (in kilojoules) is released when 15.2g of steam at 114.5∘C is condensed to give liquid water at 63.5∘C?
10. ### chemistry

Calculate the energy (in kJ) required to heat 25 g of liquid water from 25oC to 100.oC and change it to steam at 100oC. The specific heat capacity of liquid water is 4.18 J/goC, and the molar heat of vaporization of water is 40.6 kJ/mol.

More Similar Questions