Purchase Solution

Work an engine does per cycle

Not what you're looking for?

Ask Custom Question

Please do not place your response in a .pdf or .cdx format, but Word documents are okay. Thanks!

Here's the actual problem:

A heat engine using 3.30 grams of helium gas is initially at STP. The gas goes through the following closed cycle:
-Isothermal compression until the volume is halved.
-Isobaric expansion until the volume is restored to its initial value.
-Isochoric cooling until the pressure is restored to its initial value.

A) How much work does this engine due per cycle? Express your answer in joules.

B) What is its thermal efficiency? Express your answer in percent.

Purchase this Solution
Solution Summary

A work of an engine per cycles are given. Isothermal compression until the volume is halved is discussed.

Solution Preview

A) Molecular weight of Helium = 4 grams/mol
Number of moles of Helium = 3.30/4 = 0.825 mol
Initial Volume = V1 = 22.4L = 0.0224 m^3
V2 = V1/2 = ...

Purchase this Solution
Free BrainMass Quizzes
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.

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.

Basic Physics

This quiz will test your knowledge about basic Physics.

Intro to the Physics Waves

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

The Moon

Test your knowledge of moon phases and movement.

View More Free Quizzes
Related BrainMass Solutions

  • Work per second by engine

    59476 Work per second by engine A 4-cylinder gasoline engine has an efficiency of 0.230 and delivers 205 J of work per cycle per cylinder. When the engine fires at 23.3 cycles per second, what is the work done per second?

  • P-V Diagram/Entropy Change

    Problem: A reversible engine takes in 2000 joules from a reservoir at 400 K; it then gives up Q'1 joules to a reservoir at 300 K and Q1 joules to a reservoir at 200 K, doing 750 joules of work per cycle.

  • Ideal Gases & Constant Heat Capacity

    Since this is a closed cycle, the total internal energy does not change over a cycle, so the total work done by the engine must be the difference between the heat entering the system to the heat leaving the system (remember that QL is a negative number

  • Define Isentropic Efficiency of a Turbine Section

    The isentropic efficiency for an expansion process is defined as the ratio between the actual work and isentropic work. The isentropic efficiency can be numerically written as: . For air k = 1.4.

  • Carnot Cycle for an Ideal Gas

    97026 Carnot Cycle for an Ideal Gas In our work with the Carnot cycle for an ideal gas, an equation similar to (1) below was derived, where q2 is the heat taken in at T2 and q1 is the heat expelled at T1.

  • Heat Engine, Net Work, Waste Heat

    105853 Heat Engine, Net Work, Waste Heat An inventor claims to have developed a heat engine that receives 750 kJ of heat from a source at 400K and produces 250 kJ of net work while rejecting the waste heat to a sink at 300K.

  • Thermodynamics: Heat Engine

    The net work for the whole cycle is determined.

  • Showing mathematical relations for coefficient of performance of refrigeratror

    A reverse Carnot engine works as following: From point 1 to point 2 an isotherm expansion at temperature From point 2 to point 3 an adiabatic compression.

  • Important information about Heat Pump

    The engine's work output and heat intake can then be defined by looking at the energy balance over the course of one cycle.

View More Related Solutions