The topic of the lessons First law of thermodynamics
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физика
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13.11.2018
Subject Learning:
Learners can characterize electric charge
Language Learning:
✓ Learners can interpret sketch graphs to explain force between charges (speaking and listening skills OR reading and writing skills)
Lesson: 11
Date:
Grade:
The topic of the
lessons
Learning
Objectives
Lesson Objectives: By the end of the lesson, the learner will be able to:
First law of thermodynamics
✓ Explain the first law of thermodynamics.
Teacher’s name:
Number present
Number absent
✓ ALL learners will be able to recall the first law of thermodynamics
✓ MOST learners will be able to Explain the first law of thermodynamics
✓ SOME learners will be able to salve the problems.
Language
Objectives:
Useful Sets of
Phrases for
Dialogue and
Writing:
Cross curricular
links link
ICT skills
Subject Learning:
Learners can sketch and explain the meaning of Explain the first law of
thermodynamics
Language Learning:
✓ Learners can interpret sketch graphs to explain Explain the first law of
thermodynamics (speaking and listening skills OR reading and writing skills)
SubjectSpecific Vocabulary and Terminology:
thermodynamic systems , thermally isolated system , heat reservoir ,
processes, energy, transfer
(термодинамикалықжүйелер, термиялықоқшауланғанжүйе, жылурезервуары,
процестер, энергия, трансфер,)
• The study of processes in which energy is transferred as heat and as work.
• The First Law of Thermodynamics is a statement of energy conservation
for thermodynamic systems.
Chemistry
Projector or Smart board for power point presentation
Previous Learning: Heat
Planned
timings
12 min
325 min
Lesson’s plan
Planned Activities
I. Organization moment:
Greeting.
II. Introduction new topic:
Conservation laws are the cornerstones of physics. When we say a
quantity is conserved, we mean that the sum total of that quantity in a
system never changes. Quantities that are known to be conserved
include momentum, energy, angular momentum, and electric charge.
Each has its own conservation law.
Solve this anagram to identify one of the conservation laws in physics.
thermodynamicsdeals with the transfer or the actions (dynamics) of
heat.
Resources
presentatio
n
sides:
12 3
45
6
7
the study grew out of efforts to develop a engine that could
convert heat to mechanical work (such as the steam engine.)
system a definate quantity of matter enclosed by boundaries or
surfaces.
ex: a real boundary, such a the gas contained in a piston
cylinder of an engine.
ex: an imaginary boundary, such as a cubic meter of air in this
room.
thermally isolated system no heat transfer into or
out of the system.
heat reservoir a system with unlimited heat capacity so that
the addition or removal of heat causes no change in its temperature.
an uncommon, softer motive
Thermodynamics
• The study of processes in which energy is transferred as heat and
as work.
Important to define the system that we are dealing with;
•
• Everything other than the system shall be referred to as the
“environment” or “surroundings”.
First law of thermodynamics
The change in internal energyΔU of a closed system will be equal to
the energy Q added to the system minus the work W done by the system
on the surroundings.
ΔU = Q + W
The First Law of Thermodynamics is a statement of energy conservation
for thermodynamic systems.
∆U = Q + W
Q : heat
∆U : change in internal energy
W: work
Sign Convention (Very Important!)
The system is the gas, fluid, etc. you are analyzing.
+Q means heat added to the system
Q means heat removed from the system
+W means work done on the system (compression)
W means work done by the system (expansion)
2635 min
III. Problem solves
1) A gas is kept in a cylinder that can be compressed by pushing
down on a piston. You add 2500 J of heat to the system, and then
you push the piston 1.0 m down with a constant force of 1800 N.
What is the change in the gas’s internal energy?
2) 2500 J of heat is added to a system, and 1800 J of work is done
on the system. What is the change in internal energy of the
system?
IV. Home task: Find 1 problem of The First Law of Thermodynamics.
Reflection:
89
3540 min Name one thing you would like to know more
Give one thing which you find difficult
Name one thing you liked most
The topic of the lessons First law of thermodynamics
The topic of the lessons First law of thermodynamics
The topic of the lessons First law of thermodynamics
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