Chemistry

posted by .

22.) The molar heats of fusion and vaporization for water are 6.02 kJ/mol and 40.6 kJ/mol, respectively, and the specific heat capacity of liquid water is 4.18 J/gC. (1) What quantity of heat is required to melt 25.0 g of ice at 0C? (2) What quantity of heat is required to vaporoze 3.75 g of liquid water at 100C? (3) What quantity of heat is required to heat to warm 55.2 g of liquid water from 0C to 100C
(1) 8350 J
(2) 84.6 J
(3) 23.1 J
23.) Given that the specific heat capacities of ice and steam are 2.06 J/gC and 2.03 J/gC, respectively, and considering the information about water given in Problem 22, calculate the total quantity of heat evolved when 10.0 g of steam at 200C is condensed, cooled, and frozen to ice at -50C.

  • Chemistry -

    1. q = mass ice x heat fusion
    2. q = mass H2O x heat vaporization
    3. q = mass H2O x specific heat H2O x (Tfinal-Tinitial)

    23. A Loooong problem. Here is the way you do it.
    Formula for q WITHIN a phase.
    mass x specific heat x (Tfinal-Tinitial).

    Formula for q at a phase change.'
    freezing: mass x heat fusion
    boiling: mass x hat fusion.

    Then add the segments for total q.

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. Chemistry

    A quantity of ice at 0.0 degrees C was added to 33.6 of water at 21.0 degree C to give water at 0.0 degrees C. How much ice was added?
  2. chemistry

    Given that the specific heat capacities of ice and steam are 2.06 J/g°C and 2.03 J/g°C, the molar heats of fusion and vaporization for water are 6.02 kJ/mol and 40.6 kJ/mol, respectively, and the specific heat capacity of water is …
  3. Chemistry

    How much heat is released when 75.0 g of steam at 100.0°C is cooled to ice at -15.0°C?
  4. CHEMISTRY

    Given that the specific heat capacities of ice and steam are 2.06 J/g°C and 2.03 J/g°C, the molar heats of fusion and vaporization for water are 6.02 kJ/mol and 40.6 kJ/mol, respectively, and the specific heat capacity of water is …
  5. Chemistry

    Lithium metal is a highly reactive metal that oxidizes instantly in water or air. Given the data below, calculate the energy required to heat 10.0 g of Li from 150.0 °C to 200.0 °C. Molar heat capacity (solid) = 3.58 J/°C • mol …
  6. Chemistry

    Consider the process where 1.3 moles of ice, initially at -30.0 C, is heated to 140.0 C at constant pressure of 1.00 atm. The molar heat capacities (Cp) for solid, liquid, and gaseous water (37.5 J K-1 mol-1, 75.3 J K-1 mol-1, 36.4 …
  7. Chemistry

    Consider the process where 1.3 moles of ice, initially at -30.0 C, is heated to 140.0 C at constant pressure of 1.00 atm. The molar heat capacities (Cp) for solid, liquid, and gaseous water (37.5 J K-1 mol-1, 75.3 J K-1 mol-1, 36.4 …
  8. chemistry

    Calculate the energy (in kJ) required to heat 25 g of liquid water from 25oC to 100.oC and change it to steam at 100oC. The specific heat capacity of liquid water is 4.18 J/goC, and the molar heat of vaporization of water is 40.6 kJ/mol.
  9. AP Chemistry

    Given that the specific heat capacities of ice and steam are 2.06 J/g ·◦C and 2.03 J/g·◦C,respectively, calculate the total quantity of heat necessary to melt 19.2 g of ice at −50.0 ◦C and heat it to steam …
  10. AP Chemistry

    Given that the specific heat capacities of ice and steam are 2.06 J/g · ◦C and 2.03 J/g·◦C, respectively, calculate the total quantity of heat necessary to melt 19.2 g of ice at −50.0◦C and heat it to steam …

More Similar Questions