4. State the law of conservation of energy. How does it relate to energy exchanges between a thermodynamic system and its surroundings?

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Jean KeelingLv2

24 Oct 2018

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Related questions

1.) Which statement isincorrect?

(a) Energy is the capacity todo work or to transfer heat.

(b) Kinetic energy is theenergy of motion.

(d) A process that absorbsenergy from its surroundings is called exothermic.

(e) The Law of Conservation of Energy is another statement of the FirstLaw of Thermodynamics.

2. Which of the following statementsabout the first law of thermodynamics and energy is false?

(a)Kinetic energy cannot be convertedto potential energy.

(b)Kinetic energy =1/2mv².

(c)All the energy in the universe isconserved.

(d)A system can never decrease itsenergy.

(e)Potential energy is the energy ofposition or composition.

3. Whichone of the following thermodynamic quantities isnot a state function?

(a)work (b) enthalpy (c)entropy (d) internalenergy (e) free energy

A living plant leaf is an open system that exchanges energy(sunlight and thermal flows) + matter (O₂,CO₂, water vapor, etc.) with the surroundings (theexterior). Even with irreversible processes (energy dissipation) wefind that the net entropy change for the system + surroundings candecrease; i.e. dS < 0. Using equations presented in lecture andyour own critical thinking:
a) Explain how this is possible in terms of d_eS andd_iS.
b) Explain how the Second Law remains valid for this case.