Question

Please help

6. How does the First Law apply to weight gain? . What is an irreversible process? 8. Define heat engine 9. Sketch Fig. 15.7 10. Given a plot of pressure vs. volume for a thermodynamic process, how do you find the work done? 11. (T/F) For a thermodynamic process, work and heat are independent of path 12. Define isobaric, isochoric, isothermal, and adiabatic

Answer 1

6.

First law of thermodynamics : In a simple language, first law can be described as conservation of energy. It states that , for a closed system the sum of energy interactions must be zero. It means Energy in= Energy out.

In weight gain concept :

The weight must be assumed as a function of calorie. Every person should obey the first law.

i.e. Calorie In = Calorie Out

or say Calorie consumed = Calorie burned +Heat+matabolic processes etc.

Now If persons not burn the amount of calorie that they consumed , then their calorie will be stored and results in weight gain.

Calorie in - calorie out = internal energy (fat)