How Does Temperature and Pressure Affect Water Density?

Click For Summary

Discussion Overview

The discussion revolves around the effects of temperature and pressure on the density of water, particularly in the context of a homework problem involving a steel cylinder containing liquid water. Participants explore how to determine the total mass and volume of the system given specific conditions.

Discussion Character

  • Homework-related
  • Mathematical reasoning

Main Points Raised

  • One participant notes that water at 4 degrees centigrade has a density of approximately 1000 kg/m³ but questions how this changes under pressure at 25 degrees centigrade.
  • Another participant suggests that a table or chart in textbooks typically provides the necessary information for such calculations.
  • A later reply clarifies that the questions are not from the textbook, indicating that the tables do not contain the required information.
  • Participants share links to external resources, including Wikipedia and Engineering Toolbox, to find relevant data on water properties.
  • One participant outlines a series of questions aimed at guiding the problem-solving process, including inquiries about water density, mass, and the dimensions of the steel cylinder.

Areas of Agreement / Disagreement

Participants do not reach a consensus on how to find the necessary information to solve the problem, with some suggesting external resources while others express frustration at the lack of relevant data.

Contextual Notes

Participants express uncertainty regarding the density of water at 25 degrees centigrade under pressure, indicating a need for specific data that may not be readily available in standard references.

dillonmhudson
Messages
47
Reaction score
0

Homework Statement


"A steel cylinder of mass 2 kg contains 4.0 L of liquid water at 25 degrees centigrade at 200 kPa. Find the total mass and volume of the system."

Homework Equations


I know that water at 4 degrees centigrade is approximately 1000 kg/m^3. But how about when it is pressurized and at 25 degrees centigrade?


The Attempt at a Solution



I don't know where to start with this one.

Thanks for any help.
 
Physics news on Phys.org
You typically have a table or chart in your textbook which has the required info.
 
The questions are not from the textbook so the tables do not provide the required information.
 
Already been there. Didn't find anything.
 
Try this chart, you might find a better one elsewhere:

http://www.engineeringtoolbox.com/fluid-density-temperature-pressure-d_309.html

To solve the problem:

What is the water density and, therefore, the water mass ?
Can you now tell the combined mass ?
What do you have to know to estimate the volume of the steel cylinder ?
Can you approximate the steel cylinder height and inner diameter ?
What about the outer diameter ?
What will be the combined volume ?
 
Last edited:

Similar threads

Replies
1
Views
2K
  • · Replies 3 ·
Replies
3
Views
6K
  • · Replies 13 ·
Replies
13
Views
4K
  • · Replies 5 ·
Replies
5
Views
2K
  • · Replies 16 ·
Replies
16
Views
32K
  • · Replies 49 ·
2
Replies
49
Views
5K
  • · Replies 6 ·
Replies
6
Views
2K
  • · Replies 26 ·
Replies
26
Views
2K
  • · Replies 2 ·
Replies
2
Views
2K
  • · Replies 6 ·
Replies
6
Views
2K