Purchase Solution

Thermodynamics 1st Law

Not what you're looking for?

Ask Custom Question

The following are first law problems in Thermodynamics:

1. The molar energy of a mono atomic gas which obeys van der waals equation is given by:

E =(3/2)*RT - (a/V)

where V is the molar volume at temperature T, and a is a constant. Initially one mole of the gas is at temperature T1 and occupies volume V1. The gas is allowed to expand adiabatically into a vacuum so that it occupies a total volume V2.

What is the final temperature of the gas?

2. One mole of a perfect gas performs a quasi static cycle which consists of the following 4 stages:

1. from the state (P1,V1) at constant pressure to the state (P1,V2)

2. At constant volume to the state (P2,V2)

3. at constant pressure to P2,V1)

4, At constant volume back to the initial state (P!,V1.

Find: a) the work done on the gas in the cycle and the heat absorbed by the gas in the cycle.

3. The same as Problem 2 with the following 4 stages:

1. at constant volume from T1,V1) to (T2,V1)

2. isothermally to (T2,V2)

3. at constant volume to (T1,V2)

4. Isothermally back to (T1,V1)

Find: a) the work done on the gas in the cycle and the heat absorbed by the gas in the cycle.

4. calculate the change in internal energy when 1 mole of liquid water at 1 atm and 100degrees C is evaporated to water vapor at the same temp. and pressure, given that the molar volumes of the liquid and vapor under these conditions are: 18.8 cm^3/mol and 30200 cm^3/mol respectively and the latent heat of vaporization is 40600J/mol

Purchase this Solution
Solution Summary

This in-depth solution explains the first law of thermodynamics and the concepts of internal energy, heat and work in a system. It also contains step-by-step calculations to the question sets on the isobaric, isochoric, isotheral and adiabatic processes.

Solution Preview

Hi!

Here are my solutions to these problems.

I have allowed myself to ...

Purchase this Solution
Free BrainMass Quizzes
Introduction to Nanotechnology/Nanomaterials

This quiz is for any area of science. Test yourself to see what knowledge of nanotechnology you have. This content will also make you familiar with basic concepts of nanotechnology.

Variables in Science Experiments

How well do you understand variables? Test your knowledge of independent (manipulated), dependent (responding), and controlled variables with this 10 question quiz.

Classical Mechanics

This quiz is designed to test and improve your knowledge on Classical Mechanics.

Intro to the Physics Waves

Some short-answer questions involving the basic vocabulary of string, sound, and water waves.

Basic Physics

This quiz will test your knowledge about basic Physics.

View More Free Quizzes
Related BrainMass Solutions

  • Multiple choice question for understanding the laws of thermodynamics.

    1) sugar 2) carbon 3) matter 4) energy The 1st law of thermodynamics is also called the law of conservation of energy. It says that the total energy in a system can neither be created nor destroyed.

  • Applying the First and Second Law of Thermodynamics

    Sources: http://secondlawoflife.wordpress.com/tag/second-law/ www.en.wikipedia.org The solution discusses the 1st and 2nd law of thermodynamics. It also explains why high quality energy sources cannot be used more than once.

  • First law of Thermodynamics, Entropy and Enthalpy

    Change in enthalpy dH = dU+ PdV, where dU is the change in internal energy and PdV =dW is the work done due to compression of gas Here dU=36 kJ, PdV=24 kJ, dH = 36 + 24 = 60 kJ 1 For Isothermal process From (1st law of thermodynamics

  • Thermodynamics: Heat Flow, Entropy, Work

    d) Apply the 1st law of thermodynamics to the resistor in it's steady state. e) Does the entropy of the resistor change? f) Does the entropy of the environment change? g) If so, in either case, at what rate? Hi there! Here is my solution.

  • Thermodynamics Problem - 1st Law

    115778 1st Law of Thermodynamics - Internal Energy, Heat and Work Problem Calculate the change in internal energy (DU), heat (q) and work (w) when one kg of Ne is heated from 300 K to 400 K (a) at constant pressure (b) at constant volume (Assume an

  • The life and death of cells are governed by

    the laws of thermodynamics b. only the first law of thermodynamics c. only the second law of thermodynamics d. only the third law of thermodynamics e. the laws of dynamic equilibrium The answer is a) the laws of thermodynamics.

  • Physics: Second Law of Thermodynamics

    Hint: Second law of thermodynamics. 1. Use the second law of thermodynamics to explain why many poor people in developing countries live on a mostly vegetarian diet? So, first let's recall what the second law of thermodynamics states.

  • Laws of Thermodynamics - Conceptual Explanations

    The astrophysicist Eddington considered the law of thermodynamics the most important law of physics, because of the profound deductions that can be made from it. Does time move forward?

  • Entropy - explanation

    ENTROPY Entropy is a measure of disorder of a system and naturally arises from the second law of thermodynamics. It has a basis in classical and statistical thermodynamics.

View More Related Solutions