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What is the entropy change for the vaporization of 1.8 mol H2O at 100 degrees Celsius and 1 ATM?
Wiki User
∙ 12y ago
I think you meant to use the word enthalpy. Enthalpy refers to the flow of heat, while entropy means the "randomness" of a system.
Because The water is already at its boiling point (100o C), it doesn't need to be heated any more to start boiling. To find out how much energy it takes, you'll need to look up the molar heat of vaporization. Simply put, this is the amount of energy it takes to boil one mol of a substance. Water's molar heat of vaporization is 40.2 kJ/mol.
Now, all we need to do is multiply:
1.8mol * 40.2kJ/mol = 72kJ
(Note: The 1 atm is important because that is the pressure at which water's boiling point is 100oC. If there was any less pressure, it would have already boiled. If there was more pressure, it would have to heat up to the new boiling point, then use 72kJ to boil.)
Wiki User
∙ 12y ago
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Calculate the entropy of vaporization per mole of ethanol Given enthalpy change is 109.8 JK-1 mol-1 and boiling point of ethanol is 78.50C?
OK.With entalpy od vaporization and temperature of vaporization is very easy to calculate entropy of vaporization of etanol.So the equation to calculate this is:Delta_S=-Delta_H/TbWhere:Delta_S= Entropy of vaporizationDelta_H=Entalpy of vaporizationTb= Normal Boiling point temperatureSo the Delta_S become:Delta_S=-(-109000.8)/(78.5+273)Delta_S=310.1 J.mol-1.K-1
How many degrees change Fahrenheit is a 1 degree change Celsius?
1 degree Celsius = 33.8 degrees Fahrenheit 2 degrees Celsius = 35.6 degrees Fahrenheit 35.6 - 33.8 = 1.8
How many degrees in Fahrenheit is in 7 Celsius?
A change of 7.2 degrees on the Fahrenheit scale would be a change of 4 degrees on the Celsius scale. The conversion is 1.8 Fahrenheit degrees per Celsius degree (Celsius degrees are larger intervals).Example :[ Temperature in °C = 5/9 (temperature in °F - 32°) ]86° F is equal to 30° C93.2° F is equal to 34° C
What one degree change in temperature on the Celsius temperature scale is equal to a one unit temperature change on the what temperature scale?
No, the "degrees" have the same name but are different sizes. (Celsius degrees are larger intervals than Fahrenheit degrees.) A change of 1 degree Celsius is the same as a change of 1.8 degrees Fahrenheit.
Change 39 degrees Celsius to Fahrenheit?
39 degrees Celsius = 102.2 degrees Fahrenheit.
What is the tempertaure change if it was 22 degrees celsius and dropped to -6 degrees celsius?
28
Calculate the entropy of vaporization per mole of ethanol Given enthalpy change is 109.8 JK-1 mol-1 and boiling point of ethanol is 78.50C?
OK.With entalpy od vaporization and temperature of vaporization is very easy to calculate entropy of vaporization of etanol.So the equation to calculate this is:Delta_S=-Delta_H/TbWhere:Delta_S= Entropy of vaporizationDelta_H=Entalpy of vaporizationTb= Normal Boiling point temperatureSo the Delta_S become:Delta_S=-(-109000.8)/(78.5+273)Delta_S=310.1 J.mol-1.K-1
A substance has a temperature change from 20 degrees celsius to 45 degrees celsius. This corresponds to what temperature change in Fahrenheit degrees?
20 degrees Celsius is 68 degrees Fahrenheit. 45 degrees Celsius is 113 degrees Fahrenheit. So 25 degrees change Celsius = 25 x 1.8 = 45 degrees Fahrenheit. 1 degree change in Celsius is equivalent to 1.8 degrees change in Fahrenheit. Scroll down to related links and look at "Conversion of Temperature Units".
Change 59 degrees faharenheit to degrees celsius?
59 degrees Fahrenheit = 15 degrees Celsius
Change 46 degrees Fahrenheit to Celsius?
46 degrees Fahrenheit = 7.78 degrees Celsius
What is the change in average temperature between January and July if January's average temperature is 9 degrees Celsius and July's average temperature is 16 degrees Celsius in America?
The change is 7 Celsius degrees (NOT degrees Celsius).
How many degrees change Fahrenheit is a 1 degree change Celsius?
1 degree Celsius = 33.8 degrees Fahrenheit 2 degrees Celsius = 35.6 degrees Fahrenheit 35.6 - 33.8 = 1.8
Change 59 degrees fahernheit to degrees Celsius?
15
How do you change degrees from Celsius to kelvins?
Add 273.15 to Celsius to get Kelvin.
What does water change to above 100 degrees Celsius?
Steam. Water boils at 100 degrees Celsius.
What is the temperature change from 8 degrees - -7 degrees Celsius?
Since --7 deg = +7 deg, the change is 1 Celsius degree.
If the temperature of heptane increased from 90 degrees to 100 degrees would a physical or chemical change take place?
vaporization
