Need help understanding this question

  • Thread starter naim
  • Start date
In summary, the problem states that dry steam is compressed isothermally from a pressure of 1 bar to 4 bar and the initial volume is 0.5 m^3. Using the ideal gas law, the volume of the steam after compression can be calculated using the equation V2 = (P1V1)/P2, where P1 and V1 are the initial pressure and volume, and P2 is the final pressure. No further information is provided, such as temperature or superheat.
  • #1
naim
8
0

Homework Statement


Dry steam is compressed isothermally from a pressure of 1 bar to 4 bar. if the initial volume is 0.5 m^3, calculate the volume of the steam after compression

Homework Equations



Dont know

The Attempt at a Solution

 
Physics news on Phys.org
  • #2
naim said:
Dry steam is compressed isothermally …

it means with the temperature staying constant :wink:

(from the greek "iso-", meaning "same")
 
  • #3
so how do i calculate it , does anyone know the equation of how to do it?
 
  • #4
Since this is dry (completely vapor state) you could model with the ideal gas law

PV=nRT

since it is isothermal T is does not change, therefore: n,R, and T are all constant and the right side of the equation is the same before and after compression, so
P1V1=P2V2

V2 = (P1V1)/P2 , plug and chug
 
  • #5
do i convert the 1 bar ? or do i just keep it as
v2=(1x0.5)/4 ?
 
  • #6
naim said:

Homework Statement


Dry steam is compressed isothermally from a pressure of 1 bar to 4 bar. if the initial volume is 0.5 m^3, calculate the volume of the steam after compression


Homework Equations



Dont know

The Attempt at a Solution

Is there anymore information, e.g., the temperature, or the amount of superheat? Using the ideal gas law, or Boyle's law would be appropriate for an approximation. If the temperature is at a saturation level between 1 bar and 4 bar, then at the intermediate pressure, there would be some condensation (vapor to liquid transformation).
 
  • #7
no that was all the information that was given
 

FAQ: Need help understanding this question

What does "Need help understanding this question" mean?

This phrase typically means that the person is having difficulty comprehending the question and is seeking assistance in understanding it better. It is often used when the question is complex or unclear.

How can I better understand a question?

To better understand a question, it is important to first read it carefully and break it down into smaller parts. You can also try rephrasing the question or looking up any unfamiliar terms. It can also be helpful to discuss the question with others or consult additional resources.

Why is it important to understand a question before answering it?

Understanding a question is crucial because it ensures that your answer is relevant and accurate. If you do not fully understand the question, you may provide an incorrect or off-topic response. It also allows you to address any specific requirements or criteria in the question.

Can asking for help in understanding a question be beneficial?

Yes, asking for help can be very beneficial. It shows that you are willing to learn and seek assistance when needed. It can also lead to a better understanding of the topic and help you come up with a more thorough and accurate answer.

Are there any strategies for understanding complex questions?

There are several strategies that can help with understanding complex questions. These include breaking the question down into smaller parts, identifying key words and concepts, and seeking clarification from the person who posed the question. Additionally, taking breaks and approaching the question from different angles can also be helpful.

Back
Top