North East Independent School District
Physics I
Unit 8: Thermodynamics
Clarifying Statements
May, 2009
The following TEKS apply to the Thermodynamics unit:
(7) Science concepts. The student knows the laws of thermodynamics and is expected to:
(A) analyze and explain everyday examples that illustrate the laws of thermodynamics
(B) evaluate different methods of heat energy transfer that result in an increasing amount of
disorder
There are three laws of thermodynamics: (1) energy is conserved; (2) natural processes tend to
move toward greater entropy; and (3) a temperature of absolute zero is unattainable. Everyday
examples include phase changes (evaporation, condensation, freezing, melting), refrigeration,
heat pumps, air conditioning and engines. Students should have an understanding of
temperature, specific heat, pressure, thermal energy and heat. Typically heat is transferred
through conduction, convection and radiation, all of which lead to a greater amount of disorder
due to the second law of thermodynamics.
Note that both the regular and Pre-AP Physics I courses should have the same conceptual
development. However, the level of problem solving should differ due to the nature of the
associated math course requirement.
Regular Physics I Problem Solving: To obtain a better understanding of specific heat students
should calculate heat energy gained or lost using the specific heat formula.
Regular Physics I equations:
Q = mcΔT
Clarifying statements are intended to deepen teachers’ understanding of science concepts and serve as a guide for instructional
design. They are not intended to serve as student instructional materials.
This publication is the property of North East Independent School District. Duplication in whole or in part, outside of NEISD, is
prohibited without express written permission from NEISD.