Post a Module 5 Related Discussion. Main topics covered in this module are: Temp
ID: 1503556 • Letter: P
Question
Post a Module 5 Related Discussion.
Main topics covered in this module are:
Temperature Scales
Temperature and Kinetic Energy
Thermal Expansion
Heat Transfer
Heat Capacity
Phase Transitions
Heat Engines
2nd Law of Thermodynamics
Engine Efficiency
Carnot Efficiency
Real Efficiencies
In your initial posting:
Review a reference about a Device, Event, or Activity Using One of These Principles.
Summarize the reference.
Make an initial posting of something related to (One These Subjects) An interesting discovery, news item or application of the topic would make good postings. Initial posts should be at least 1(50 words)
Explanation / Answer
Temperature is the degree of hotness or coldness.
Heat is the energy in transit due to temperature difference, when energy transfers from one body to another due to temperature difference. It is known as heat.
Temperature is measured in degree Celsius , Kelvin or Fahrenheit.
In degree Celsius scale, boiling point of water is 100 and freezing point is 0.
In Kelvin scale these points are 373.15 and 273.15 respectively. And in Fahrenheit scale these points are 212 and 32 respectively.
Temperature is measure of kinetic energy of the molecules of the body scientifically.
When temperature of a body is increased its length increases which is thermal expansion.
Heat transfer can be through three modes conduction, convection and radiation.
Heat capacity of a body is the heat required to raise the temperature by unit degree of unit mass body.
Phase transition is the phenomena in which a body changes its state, may be from solid to liquid or liquid to gas. Heat is transferd at constant temperature in phase transition.
Heat engines works on thermodynamics cycle based on 2nd law of thermodynamics, heat is added to the engine, some of that heat is converted into work and rest is ejected to the sink depending on the efficiency of the engine.
2nd law of thermodynamics is simply energy conservation,
Q = U + W
Heat added to the system will go to its internal energy and some work will be done on the system.
Engine efficiency is the ratio of work output to the total heat addition.
Carnot efficiency = 1- T2/T1
Where T1 is the temperature of source and T2 is the temperature of the sink.
Real efficiency is less than Carnot efficiency as Carnot cycle is not practically possible.