Running Head: UNIT EIGHT WORKSHEET FOR PROBLEM SOLVING
Unit Eight Problem Solving
UNIT EIGHT WORKSHEET FOR PROBLEM SOLVING
This assignment will allow you to demonstrate the following objectives:
Describe thermodynamic concepts and their applications.
o Extend the first law of thermodynamics to various daily life activities.
o Identify the maximum efficiency of a heat engine.
o Explain the role of latent heat while phases are changing.
Instructions: Choose 8 of the 10 problems below. Show your work in detail. Answer the
questions directly in this template. Before doing this, it is highly recommending that you
thoroughly review the four examples in the Unit Lesson.
1. The efficiency of a Carnot engine is e=1-Tc/TH, where Tc is a temperature of the cold reservoir
and TH is a temperature of the hot reservoir. What is the condition to have 100% efficiency? Hint:
What is the mathematical condition for Tc/TH to be zero.
An absolute zero condition as the temperature of the cold reservoir remains the only option
to achieve efficiency of 100%. An excellent example of this can be (300 – 0)/300 = 1, in
which 300k is the hot reservoir temperature, and an absolute zero becomes the cold
reservoir temperature. It is only in such an idealized case that an ideal 100 percent
efficiency is possib...