Straighterline Introduction to Physics (lab) PHY250L Lab 10 Thermodynamics COMPLETE Worksh
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Lab Report Format Expectations
Utilize college level grammar and formatting when answering text based questions.
Report all equations in a proper mathematical format, with the correct signs and symbols.
Submissions with incomplete or improperly formatted responses may be rejected.
Pre-Lab Questions
1. The first law of thermodynamics discusses the interplay between heat and work and how they
come together to describe the internal energy changes of a system undergoing a
thermodynamic process. Importantly, though, the first law of thermodynamics is, at its core, a
statement about the conservation of energy. Energy cannot be created or destroyed. it cannot
vanish into nothingness or spontaneously appear. This law can be stated mathematically as:
= −
Explain how this equation demonstrates both the first law of thermodynamics and the concept of conservation of
energy The formula states that the net heat transfer into a system less the net work the system
performs equals the change in internal energy of the system. This suggests that a system's
internal energy can be changed by adding or removing heat from it as well as by the work the
system performs.Moreover, the equation states that energy cannot be created or destroyed.
This is true because energy is produced during both the net work of the system and the net
heat transfer into the system. If the change in the system's internal energy is equal to the net
heat transfer into the system less the net work performed by the system, then the total amount
of energy in the system must remain constant.
2. Note the negative (-) sign for work, W, in the above equation. The choice of a negative or a
positive sign depends on the way you describe the system.
Explain when the work term would have a positive magnitude and when it would have a
negative magnitude. In your response, utilize the work equation, which is below, to justify
your response.
=−
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