Purchase Solution

Refrigerators: Liquid Ammonia and Heat Energy

Not what you're looking for?

Ask Custom Question

Liquid ammonia, NH3(l), was once used in home refrigerators as the heat transfer fluid. The specific heat of the liquid is 4.7 J/g.K and that of the vapor is 2.2 J/g.K. The enthalpy of vaporization is 23.33 kJ/mol at the boiling point. If you heat 12 kg of liquid ammonia from
-50.0 °C to its boiling point of -33.3 °C, allow it to evaporate, and then continue warming to 0.0 °C, how much heat energy must you supply?

Please provide detailed explanation.

Thanks!

Purchase this Solution
Solution Summary

Are you confused about how to calculate the heat required to raise temperature and then evaporate a liquid? In this solution, a full description of this process is given with calculations and all work is shown.

Solution Preview

We have three stages of heat application, they include the following:

1) Heating the liquid (specific heat of 4.7 J/gK)
2) Evaporation (23330 J/mol)
3) Heating of the ...

Purchase this Solution
Free BrainMass Quizzes
Periodic table

Organic Chemistry Naming: Alkanes

This is a quiz which is designed to assist students with learning the nomenclature used to identify organic compounds. This quiz focuses on the organic compounds called Alkanes.

Thermochemistry

The quiz helps in revising basic concepts about thermochemistry.

Functional groups in Organic Chemistry

You will be tested on the names of functional groups in Organic Chemistry. It is very important to know the functional groups to understand Organic reactions.

Match Elements with their Symbols

Elements are provided: choose the matching one- or two-letter symbol for each element.

View More Free Quizzes
Related BrainMass Solutions

  • Calculation of ammonia thermodynamic properties

    First part was the calculation of the thermodynamic properties of ammonia (change of enthalpy, change of entropy and change of free energy).

  • Ammonia and Oxygen

    169297 Ammonia and Oxygen The reaction of ammonia with oxygen (from the air) to form nitrogen monoxide (NO, also known as nitric oxide ) is the first stage in the industrial conversion of ammonia into nitric acid.

  • Mixing of liquids: Temperature and energy.

    184684 Mixing of Liquids: Temperature and Energy Two volumes V1 and V2 of the same incompressible liquid at temperatures T1 and T2 are mixed together in a thermally isolated container.

  • Enthalpy, Heat of Formation and Heat of Vaporization

    Heat of vaporization is used along with the specific heat of the compound in the liquid and gaseous phases.

  • How it's possible for snow to contain more heat than water

    55029 How Snow Can Contain More Heat Than Water Explain how it is possible for a 30,000 kg of snow at 0 deg C to contain more heat energy than 1 mL of liquid water at 100 deg C. (Assume a pressure of one atmosphere).

  • Understanding Vapour Pressure

    In the case of a phase transition, solid to liquid, liquid to gas, etc., the pressure over the phases is constant so the interesting combination is the Gibbs Free Energy; which is the sum of the enthalpy change and the heat associated with the entropy

  • Heat and Thermodynamics: Change of state

    At melting point, the solid melts and the potential energy of the molecules increases in doing work against intra-molecular forces and hence he heat supplied is consumed to increase the potential energy of molecules, not the kinetic energy, and hence,

  • heat and energy

    Heat, Energy, and Changes of State Part A How much energy in joules would be absorbed by 3.0 L of liquid oxygen as it vaporized? The density of liquid oxygen at its boiling point is 1.14 kg/L , and its heat of vaporization is 213 kJ/kL .

  • Benzene as an Organic Solvent

    This solution contains step-by-step calculations to determine the energy required to heat benzene, volume of benzene and the energy required to cool benzene in the associated situations. All workings and formulas are shown.

View More Related Solutions