# chemistry

posted by .

how much heat is needed to change 20 g of solid water at 0 c to liquid water at 15 c?

• chemistry -

q1 = heat needed to melt solid water at zero to liquid water at zero.
q1 = mass x heat fusion.

q2 = heat needed to raise T from zero C to 15 C.
q2 = mass water x specific heat water x (Tfinal-Tintial)
Total Q = q1 + q2

## Similar Questions

1. ### Chemistry

How much energy (heat) is required to convert 248 g of water from 0oC to 154oC?
2. ### Chemistry

if the temperature of a 500.0g sample of liquid water is raised to 2.00c how much heat is absorbed by the water?
3. ### Chemistry

The heat of fusion of water is 6.01 kJ/mol. The heat capacity of liquid water is 75.3 J/mol • K. The conversion of 50.0 g of ice at 0.00°C to liquid water at 22.0°C requires how much kJ of heat?
4. ### Chemistry

how much heat must be lost by 375 g of water for it to change from a liquid to a solid?
5. ### chemistry

If the temperature of a 500.0-g sample of liquid water is raised 2.00c how much heat is absorbed by the water?
6. ### chemistry

the heat of vaporization for water is 540 cal/g. how many kilocalories are needed to change 22g of liquid water to steam at 100*c?
7. ### Chemistry

How much heat is needed to change 3kg of copper from a solid to a liquid?
8. ### CHM

Heat of fusion (¦¤Hfus) is used for calculations involving a phase change between solid and liquid, with no temperature change. For H2O, ¦¤Hfus=6.02 kJ/mol. Specific heat capacity (C) is used for calculations that involve a temperature …
9. ### 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.
10. ### chemistry

1. Given that 50 grams of ice is heated at -20.0 °C to steam at 135.0 °C. i. Show the graph of the changes from ice to steam ii. Calculate the energy needed to change the ice to steam Please use these values: Heat of fusion = 334.16 …

More Similar Questions