chem 101

posted by .

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 alcohol must be burned to generate enough heat to warm the water as described in problem 3?

correct answer: 10.4

the only mention of an alcohol is ethyl alcohol (C2H6O) in the question before this where you find its heat of combustion.

correct answer: -1238.43 kJ/mol

  • 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 ethanol to burn to provide 279 kJ.
    46 g x (279/1238.43) = 10.36 g which rounds to 10.4 g.

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. Physics

    the pressure is one atmosphere and determine the heat in joules required to produce 5.03 kg of water vapor at 100.0 °C, starting with (a) 5.03 kg of water at 100.0 °C and (b) 5.03 kg of liquid water at 0.0 °C. for part (a) I used …
  2. Chem 101

    How many calories are required to raise the temperature of 24.4 g of water by 27.8°C
  3. physics

    (a) How much heat is required to raise by 12.40°C the temperature of 1.4 kg of water. (b) How much heat is required to raise by 12.40°C the temperature of 1.4 kg of iron.
  4. chem 101

    How much heat is required to raise the temperature of exactly one liter of water fro m 60 °F to 180 °F?
  5. chem 101

    How much heat is required to raise the temperature of exactly one liter of water fro m 60 °F to 180 °F?
  6. Physics

    How much heat is required to raise by 10.30°C the temperature of 1.2 kg of water?
  7. physics

    An ice bag containing 0°C ice is much more effective in absorbing heat than one containing the same amount of 0°C water. (a) How much heat in kcal is required to raise the temperature of 0.700 kg of water from 0°C to 27.0°C?
  8. chemistry

    Question Part Points Submissions Used A swimming pool, 20.0 m ✕ 12.5 m, is filled with water to a depth of 3.85 m. If the initial temperature of the water is 18.9°C, how much heat must be added to the water to raise its temperature …
  9. Chem

    41. How much heat energy must you use to raise the temperature of 100 grams of water from 60C to 70C. Show your calculations. 42. You have a pot of 100C liquid water. If you add heat to the water, will the temperature start to raise …
  10. chem 101

    Calculate the amount of heat required to raise the temperature of a 25 g sample of water from 9 ∘C to 30 ∘C. Express your answer using two significant figures.

More Similar Questions