# chem

posted by .

HOw much energy is required to heat 36.0g H2O from a liquid at 65C to a gas at 115C? The following physical data may be uselful.
Hvap=40.7kJ/mol
C liquid=4.18
C gas=2.01
C solid= 2.09
T melting=0 C
T boiling=100 C

However I'm not sure how you get this,
so H=H heating liquid+H vap+H heating gas. I'm not getting the same answer

• chem -

q for liquid is mass x specific heat x delta T. or for gas is mass x specific hat gas x delta T.
q for phas change is mass x delta Hvap or delta H fusion

## Similar Questions

1. ### Chemistry

Calculate the heat (in kJ) required to transform 58.60 g of dinitrogen tetraoxide from a solid at a temperature of -9.3 °C to a gas at 47 °C. Report your answer to one decimal place. Data: Molar mass of dinitrogen tetraoxide, N2O4 …
2. ### Chem II

Sulfur dioxide is produce din enormous amounts for sulfuric acid production. It melts at -73 degrees C and boils at -10 degrees C. Its heat of fusion is 8.619 kJ/mol and its heat of vaporation is 25.73 kJ/mol. The specific heat capacities …
3. ### chemistry

As the temperature of a gaseous substance is decreased at constant pressure, it will undergo a series of physical changes. Which is the correct sequence of physical states that will be encountered?
4. ### Chemistry

chloroform (chcl3) has a Hvap of 29.6 kj/mol and its boiling point occurs at 61.7c. the specific heat capacity of liquid chloroform is 0.622 J/gC while that of the gas is 0.714 J/gC. How much energy (in kJ) needs to be removed to condense …
5. ### CHEMISTRY

Consider a 58.4 g sample of H2O(g) at 125°C. What phase or phases are present when -162 kJ of energy is removed from this sample?
6. ### AP Chem

Need help with this practice problem. I got the values for the gas to liquid and liquid to solid. Don't know how to do the rest?
7. ### AP Chem

Need help with this practice problem. I got the values for the gas to liquid and liquid to solid. Don't know how to do the rest?
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

Some physical properties of water are shown below: melting point 0.0°C boiling point 100.0°C specific heat solid 2.05 J/g·°C specfic heat liquid 4.184 J/g·°C specific heat gas 2.02 J/g·°C ΔH° fusion 6.02 kJ/mol ΔH° …
10. ### CHECK my answers Physical science

1. which of the following should be classified as a suspension?

More Similar Questions