chemistry 101

How much alcohol must be burned to generate
279kj of heat to warm the water as described in
problem 3? (60F to 180F)

I've seen where they say the answer is

(mass of alcohol)(heat ofcombustion)=279

and you solve for mass. However how am I to know which heat of combustion to use. The only values we are given are some heat of formation.

asked by Anonymous
  1. You've only posted parts of the problem.
    You must first convert 60 F to C and 180 F to C.
    Next you write the equation and balance it.
    Third you use the heats of formation to find the heat of combustion for a mole of the material. If you will post the entire problem I can go through the process. I think what you show as the "ANSWER" is a part of an answer I gave earlier. I think you have misinterpreted the answer and the problem.

    posted by DrBob222

Respond to this Question

First Name

Your Response

Similar Questions

  1. chem 101

    This is second part is built off the first question. These are all from a practice test. How much heat is required to raise the temperature of exactly one liter of water fro m 60 °F to 180 °F? correct answer: 279kj How much
  2. chem 101

    How much alcohol must be burned to generate 279kj of heat to warm the water as described in problem 3?(from 60 F to 180 F) a. 18.7 g b. 2.9 g c. 1.6 g d. 10.4 g e. 9.3 g the answer is D help with solution?
  3. chem 101

    60F is 15.55 C 180 F is 82.22C delta T = 82.22-15.55 = 66.67 q = mass x specific heat x delta T q = 100g x 4.184 x 66.67 q = 278,947 = 279 kJ. Burning alcohol (46 g ethanol) provides 1238.43 kJ/mol. We want to know how many g
  4. chemistry

    If you used the alcohol burner to heat the water and all of the heat from the burning of the alcohol went into heating the water, how many grams of alcohol will you burn to do that heating? (Remember, for every 7,000 calories
  5. Chemistry

    Isopropyl alcohol, C3H7OH is an organic compound. It melts at -89 C and boils at 82.6 C. IT has a heat fusion of 88 J/g and a heat of vaporization of 733.33 J/g. The specific heat of liquid isopropyl alcohol is 2.68 J/g-C. The
  6. chemistry

    An alternative approach to bomb calorimetry is toestablish the heat capacity of the calorimeter, exclusive of the water it contains. The heat absorbed by the water and by the rest of the calorimeter must be calculated separately
  7. heat of vaporization

    Suppose that 1.00 g of rubbing alcohol (C3H8O) evaporates from a 54.0 g aluminum block. If the aluminum block is initially at 25 C, what is the final temperature of the block after the evaporation of the alcohol? Assume that the
  8. MATH

    Isopropyl alcohol, C3H8O, is used in rubbing alcohol mixture. Alcohol on the skin cools by evaporation. How much heat(in kJ) is absorbred by the alcohol of 2.25g EVAPORATED? THE HEAT VAPORIZATION OF Isopropyl alcohol is 42.1
  9. chemistry

    If im trying to separate alcohol from water by distillation, is it possible if I heat the mixture to 100degreeC so water reaches its boiling point? I mean, is this method only workable if I distill the alcohol which has a lower
  10. chemistry

    Ethyl alcohol (CH3CH2OH) has a heat of fusion of 5.01 kj/mol. How much heat in kj is required to melt 137g of ethyl alcohol.

More Similar Questions