chemistry

posted by .

When 47.5J of heat are added to 13.2 g of liquid, its temperature rises by 1.72 degrees C. What is the heat capacity of the liquid?

A cook wants to heat 1.35kg of water from 32.0 degrees C to 100 degrees C. If he uses combustion of natural gas to heat the water, hou much natural gas will he need to burn? Natural gas produces 49.3kJ of heat per gram. (for the sake of simplicity assume that the transger of heat is 100% efficient.)

Thanks:)

  • chemistry -

    1.
    q = mass liquid x sp. h. x (Tfinal-Tinitial)
    Solve for sp.h.

    2.
    How much heat is needed? That is
    q = mass x specific heat x (Tfinal-Tinitial). Solve for q.
    Then CH4 + 2O2 ==> CO2 + 2H2O

    16 g CH4 x (q in Joules/49,300 J) = ? g CH4.

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. Physics

    Spent steam from an electric generating plant leaves the turbines at 120.0 degrees Celsius and is cooled to 90.0 degrees Celsuius liquid water by water from a cooling tower in a heat exchanger. How much heat is removed by the cooling …
  2. Chemistry

    The heat of fusion for water is 80cal/g. The specific heat of liquid water is 1.00cal/g. How many calories of heat are released when 20g of water at 30 degrees is cooled to 0 degrees and frozen to ice at 0 degrees?
  3. chemistry

    given the following info for water molar heat of specific heat capacity of liquid water 4.18 j/g degrees calculate the total quanity of heat evolved when 10.0g of steam is condensed,cooled,and frozen to ice at -50 degrees
  4. Chemistry

    18.0 g of liquid water is initially at 0 C. How much heat, in kJ, must be added to transform this into 18.0 g of steam at 200 C?
  5. chemistry

    How much energy (in kJ) is released when 16.4 g of steam at 121.5 degrees C is condensed to give liquid water at 60.5 degrees C?
  6. physics

    A copper calorimeter of mass ()g contains 380g of a liquid at 12degrees Celsius. A 20W heater is used for 3 minutes to raise the temperature of the liquid and calorimeter to 17 degrees Celsius. The calorimeter has a specific heat capacity …
  7. Chemistry

    When 47.3J of heat are added to 13.0g of a liquid, its temperature rises by 1.76C. What is the heat capacity of the liquid?
  8. physics

    A flow calorimeter is used to measure the specific heat of a liquid. Heat is added at a known rate to a stream of the liquid as it passes through the calorimeter at a known rate. Then a measurement of the resulting temperature difference …
  9. chemistry

    When 51J of heat are added to 13g of a liquid, its temperature rises from 10.2 ∘ C to 12.6 ∘ C. What is the heat capacity of the liquid?
  10. Science

    90 calories of heat is added to 1 gram of fresh water with an initial temperature of 10 degrees Celcius. What is the final temperature of this liquid?

More Similar Questions