Thermodynamics hw question

In summary, the first law of thermodynamics states that energy cannot be created or destroyed, only transferred or converted. Heat is the transfer of energy, while temperature is a measure of the average kinetic energy of particles. Endothermic reactions absorb heat, while exothermic reactions release heat. The second law of thermodynamics states that entropy will always increase in a closed system. The efficiency of a heat engine is calculated by dividing the work output by the heat input and multiplying by 100%.
  • #1
andytran
41
0
Hi,

i'm stuck on this question for my hw, please do give any advice/suggestions .. thanks!


For Berthelot equation of state P = RT/(v-b) - a/(Tv^2)

where T is the thermodynamic temp, a and b are constants, R is the Universal gas constant.

a) Show that Lim_(T->infinity) v/T = R/P
(just to be clear, it's the limit of v/T where T goes to infinity is equal to R/P)

thanks again!
 
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  • #2
nvm solved it. thanks for viewing anyway...
 
Last edited:
  • #3


Hello,

Thank you for reaching out for help with your homework question. The Berthelot equation of state is a mathematical representation of the relationship between pressure, volume, and temperature for a gas. In this equation, a and b are constants that depend on the gas being studied, and R is the Universal gas constant.

To show that Lim_(T->infinity) v/T = R/P, we can start by rearranging the equation to solve for v/T:

v/T = (RT/P) - (a/P)(1/Tv^2)

Next, we can take the limit as T approaches infinity. As T gets larger and larger, the second term on the right side of the equation will approach zero, leaving us with:

Lim_(T->infinity) v/T = RT/P

Finally, we can substitute in the value for R/P, which is a constant, to get:

Lim_(T->infinity) v/T = R/P

I hope this explanation helps and that you are able to successfully solve your homework question. Remember to always check your work and double check your units to ensure you have the correct answer. Good luck!
 

1. What is the first law of thermodynamics?

The first law of thermodynamics, also known as the law of conservation of energy, states that energy cannot be created or destroyed, only transferred or converted from one form to another.

2. What is the difference between heat and temperature?

Heat is the transfer of energy from a hot object to a colder object, while temperature is a measure of the average kinetic energy of the particles in a substance.

3. How does an endothermic reaction differ from an exothermic reaction?

An endothermic reaction absorbs heat from its surroundings, resulting in a decrease in temperature, while an exothermic reaction releases heat into its surroundings, resulting in an increase in temperature.

4. What is the second law of thermodynamics?

The second law of thermodynamics states that the total entropy (disorder) of a closed system will always increase over time. This means that natural processes tend to become more disordered and less organized.

5. How is the efficiency of a heat engine calculated?

The efficiency of a heat engine is calculated by dividing the work output by the heat input, and then multiplying by 100% to get a percentage. Efficiency = (Work output / Heat input) x 100%

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