physics(heat)

posted by .

A geyser heats water flowing at the rate of 3L/min from 27 deg C to 77 deg C. if the geyser operates on a burner, what is the rate of combustion of the fuel if its heat of combustion is 40000J/g?

  • physics(heat) -

    V/t =3L/min => m/t = 3 kg /min =3/60 =0.05 kg/s
    ΔT = 77-27 = 50ºC
    Specific heat of water c =4 180 J/kg•ºC.
    Amount of heat used per second is
    ΔQ/t =m•c• ΔT/t = 0.05•4180•50 =10450 J/s
    Heat of combustion r = 4•10^7 J/kg

    Rate of combustion of fuel is
    10450/ 4•10^7 =2.61•10^-4 kg/s =
    =0.0157 kg/min =15.7 g/min.

  • physics(heat) -

    thanks :)

  • physics(heat) -

    thank you so much :)

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. Chemistry

    What is the final temperature when 50.0 g of Chromium at 15 deg. C (specific heat of Cr = 0.107 cal/g-deg.) is added to 25 ml of 45 deg.C water?
  2. chemistry

    While researching energy values of fuels, a chemist designed an experiment to find out the heat of combustion of pentane. Using the known hexane heat of combustion of hexane = 4650kJ/mol and the data below calculate the heat of combustion …
  3. chemistry

    substance X has a molar mass of 107.6 g/mol. When 2.50 g of substance x burns in an iron calorimeter, the temp. of the calorimeter and the water (2.000 Kg) increases from 25.8 deg. C to 38.7 deg. C. What is the molar heat of combustion …
  4. chemistry

    the heat of fusion water is335 J/g. The heat of evaporization of water is 2.26 kJ/g, the specific heat of ice is 2.05 J/Deg/g, the specific heat of steam is 2.08 J/deg/g and the specific heat of liquid water is 4.184 J/deg/g. How much …
  5. physics(heat)

    A geyser heats water flowing at the rate of 3L/min from 27 deg C to 77 deg C. if the geyser operates on a burner, what is the rate of combustion of the fuel if its heat of combustion is 40000J/g?
  6. Heat Transfer

    A fin 30 cm long & 10mm diameters throughout is made of steel alloy of thermal conductivity 43 W/m-deg. the fin attached to a plane heated wall at 200 deg.C temp. extends into surroundings at 25 deg.C.& Unit surface conductance of …
  7. Heat Transfer

    A fin 30 cm long & 10mm diameters throughout is made of steel alloy of thermal conductivity 43 W/m-deg. the fin attached to a plane heated wall at 200 deg.C temp. extends into surroundings at 25 deg.C.& Unit surface conductance of …
  8. Phase Changes

    The heat of fusion of water is 335 J/g, the heat of vaporization of water is 2.26 kJ/g, the specifc heat of ice is 2.05 J/deg/g, the specific heat of steam is 2.08 J/deg/g and the specific heat of liquid water is 4.184 J/deg/g. How …
  9. Building services

    Principles of heat: How many kilograms of water can be evaporated at 100 degrees Celsius by the combustion of 470 litres of fuel oil whose heat of combustion is 37 MJ/Litre
  10. Physics

    How many kilograms of water can be evaporated at 100 degrees Celsius by the combustion of 470 litres of fuel oil whose heat of combustion is 37 MJ/Litre

More Similar Questions