Calculate the heat required to convert 10.0 g of Freon-11 from a liquid at –50.0°C to a gas at 50.0°C?
Freon-11, which has the chemical formula CCl3F, has a normal boiling point of 23.8°C.
The specific heats of CCl3F(l) and CCl3F(g) are 0.87 J/gK and 0.59 J/gK respectively. The heat of vaporization for the compound is 24.75 kJ/mol. Calculate the heat required to convert 10.0 g of Freon-11 from a liquid at –50.0°C to a gas at 50.0°C.
How do i change the specific heats from J/gK to J/gC? thanks a bunch!
More Questions From This User See All
Answers & Comments
Verified answer
J/gK and J'gC are the same thing
There are 3 steps here. heat the liquid, change liquid to gas and heat the gas
1. q = m Cp delta T
m = 10.0g
Cp = 0.87
delta T = 23.8- (-50)
2. q = m Hf
m = 10.0g (need to convert this to moles) q is in kilojoules
Hf = 24.75
3. q = m Cp delta T
m = 10.0g
Cp = 0.59
delta T = 50 - 23.8
add the 3 q's together. remember to change the second q from KJ to J.