Correcting for room temperature and atmospheric pressure

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Homework Help Overview

The discussion revolves around converting 1 milligram of water to milliliters at room temperature and atmospheric pressure, specifically referencing the equivalence at 3.93 degrees Celsius and 1013.25 kPa. Participants are exploring the relationship between mass and volume in the context of water's density under varying conditions.

Discussion Character

  • Exploratory, Conceptual clarification, Assumption checking

Approaches and Questions Raised

  • Participants express uncertainty about the conversion and the relevance of temperature and pressure. Some mention the ideal gas law (PV=nRT) but recognize it may not apply to liquids. Others suggest looking up density tables and considering the non-linear relationship of water's density with temperature.

Discussion Status

The discussion is ongoing, with participants providing suggestions for resources such as density tables and questioning the assumptions about temperature's effect on density. There is no clear consensus, but several productive lines of inquiry are being explored.

Contextual Notes

Participants note that the pressure's effect on water density is minimal and emphasize the importance of experimental measurements in understanding the relationship between mass and volume for liquids.

iyun
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1. I would like to convert 1 milligram of water to mililitres at room temperature and atmospheric pressure
I know that they are equivalent at3.93 celsius and an air pressure of 1013.25kPa



Homework Equations



1mg=1ml at 3.93 celsius and 1013 kPa

The Attempt at a Solution



unsure
 
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iyun said:
1. I would like to convert 1 milligram of water to mililitres at room temperature and atmospheric pressure
I know that they are equivalent at3.93 celsius and an air pressure of 1013.25kPa



Homework Equations



1mg=1ml at 3.93 celsius and 1013 kPa

The Attempt at a Solution



unsure


ever heard of this formula:
PV=nRT?

use it! :redface:
 
oops... that was for gases lol

there might be some for liquids

try assuming that there's a linear relationship ...
so T1/something = T2/something
 
Look up a density table for water.
 
Im unclear on T1/something=T2/something
there's just one temperature here -water at room temperature
thanks
 
You need a table of the density of water at different temperatures, the pressure is only going to have a very small effect.
There is no law for this as such it is an experimental measurement.
 
how does density play into the equation?
 
The density of water chnages with temperature in a rather unusual way.
The maximum density is at just under 4degC, hotter than that water expands slightly so your 1mg of water will take up slightly more than 1ml of volume at room temperature.
As I said there isn't a law predicting this although there are probably equations which are fits to the experimental data. It certainly isn't linear.
 

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