How Do You Calculate Entropy Changes in Thermodynamics?

In summary, the conversation is about calculating the entropy changes (system, surroundings, and universe) for the cooling of 1 mol of O2 (g) from 298 K to O2 (l) at 90.19 K, using reversible and irreversible processes, by placing the sample in liquid hydrogen at 13.96 K. The problem also involves determining the entropy changes for all types of entropy. The solution to this problem has not been attempted yet and the poster is seeking help.
  • #1
rafaela.nita
1
0
Thermodynamics for P Chem NEEd HELP By tomorrow!

Homework Statement



What are the values of the entropy changes (system, surroundings, and universe) for the cooling of 1 mol of O2 (g) from 298 K to O2 (l) at 90.19 K if the process is done

a. Reversibly
b. Irreversibly

by placing the sample in liquid hydrogen at 13.96 K? Assume enthalpy change of vaporization is 6820 j/mol at 90.19 K and Cp = 7/2 R for the gas.

Homework Equations



How do you solve this problem for all types of entropy?(entropy changes (system, surroundings, and universe)


The Attempt at a Solution


Have no clue how to start it. Please help!
 
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Welcome. Please use this resource wisely. Posts that specify that you need help in the next 24 hours or shorter are probably not going to encourage many members to help you. If you let your problem get that urgent, the motivation to help you will be minimal.
 

Related to How Do You Calculate Entropy Changes in Thermodynamics?

What is thermodynamics?

Thermodynamics is the scientific study of the relationship between heat, energy, and work. It deals with how energy is transferred and transformed within a system and its surroundings.

How does thermodynamics relate to physical chemistry?

Thermodynamics is a fundamental concept in physical chemistry. It helps us understand and predict the behavior of molecules and chemical reactions by studying the flow and exchange of energy between them.

What is the first law of thermodynamics?

The first law of thermodynamics, also known as the law of conservation of energy, states that energy cannot be created or destroyed, only transferred or converted from one form to another.

What is the second law of thermodynamics?

The second law of thermodynamics states that in any energy transfer or conversion, some energy will be lost as heat, resulting in a decrease in the overall usable energy in the system. This is often referred to as the law of entropy.

How is thermodynamics applied in real-world situations?

Thermodynamics has many practical applications, such as in designing energy-efficient engines and power plants, optimizing chemical processes, and understanding natural phenomena like weather patterns and the behavior of stars and planets.

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