Ask Experts Questions for FREE Help !
Ask
    hslove142331's Avatar
    hslove142331 Posts: 71, Reputation: 1
    Junior Member
    		  
    #1

    Jan 21, 2010, 08:06 PM
    how much heat is required?
    Heat of vaporization of water is expressed as △H=40.7KJ/mol. How much heat is required to vaporize 0.123g of vapor water?

    0.123gx(1mol/18g/mol)=0.00683molx40.7KJ/mol=0.277981KJ

    I did it.. I hope it is correct, but I am not sure !

    Please check it , Thanks
    Unknown008's Avatar
    Unknown008 Posts: 8,076, Reputation: 723
    Uber Member
    		  
    #2

    Jan 22, 2010, 11:42 AM

    Yes, that's correct, but be sure to keep your answer to a certain number of significant figures. Here, the question put 3 significant figures, so, your answer will be 0.278 kJ.
Not your question? Ask your question View similar questions
 

Question Tools Search this Question
Search this Question:

Advanced Search

Add your answer here.


Check out some similar questions!

Heat pump never turns on, handler blows continuous with no heat except with AUX heat [ 2 Answers ]

10 year old Rheem air handler RHBA-21J8MFCA, 1/3HP, 2.8A. New WeSt Columbia, SC 29170, Model 2HP13L48P-1B, HCFC-22, 4TON. Installed new out of box iN July and AC working splendidly but start-up is "violent" and loud. Installer says I need some sort of "start-up kit". I put off as had planned...

Calculate the quantity of heat(J) required. I did it! [ 1 Answers ]

To make a cup of coffee, you heated 0.175kg of water to change the water temperature from 23.OC to 89.0C . Calculate the quantity of heat(J) required. (175g)(4.18J/g)(89-23)=48279J I did it... Is it correct? Thanks

Adding a zone for heat in the basement-Is permit required? [ 4 Answers ]

Hi, We are finishing our basement. I want to add a zone for heat in the basement. Is permit required to put heat in the basement. Our house is heated with oil. I applied for permit for finishing the basement as a home owner and got the permit! I live in Massachusetts! Thank You for answering my...

How much heat is required to convert this ice cube into steam [ 1 Answers ]

An ice cube of volume 6.1 cm3 is initially at a temperature of -13.6°C. How much heat is required to convert this ice cube into steam?

Required minimum temp of heat in NY [ 1 Answers ]

What is the minimum temperature of the apartment in Yonkers, NY? My average temp is 61 degrees, even though I sealed all the windows and gaps. I am on a month to month and all three tenants agree that she does not give us enough heat or hot water, yet we are all afraid she will remind us "If you...

View more questions Search