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First Law of Thermodynamics (Grades 11-12)

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First Law of Thermodynamics

The branch of science dealing with the study of the flow of energy is called                .
  1. kinesiology
  2. thermodynamics
  3. ergodynamics
  4. ergonomics
When heat flows into a closed system, its internal energy tends to                       .
A process that occurs without heat transfer between a system and its surroundings is called a/an                          process.
One way of achieving an adiabatic process is by                          a system from its surroundings.
A system's internal energy is 20 Joules. 30 Joules of work is done on the system in an adiabatic process. What is the system's resultant internal energy?
  1. 20 Joules
  2. 30 Joules
  3. 50 Joules
  4. 50 Joules minus dissipated heat
Compressing a gas can be considered to be the work done on the gas.
  1. True
  2. False
What is the assumption made by the Zeroth Law of Thermodynamics?

The first law of thermodynamics states that
  1. components of a system interact.
  2. entropy of a closed system always increases.
  3. a closed system always shifts toward disorder or homogeneity.
  4. energy is always conserved.
The change in the internal energy of a closed system is equal to the amount of heat supplied to the system, minus
  1. the amount of heat that is not conserved.
  2. the amount of work done by the system on its surroundings.
  3. the original internal energy.
  4. the volume difference.
A closed system's internal energy is 30 Joules. Some heat is supplied to it, and it does 20 Joules of work. After this, the closed system's internal energy is 80 Joules. How many Joules of heat were added to the system?
  1. 50
  2. 60
  3. 70
  4. 80
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