How do you determine value of abosolute zero from a graph?
Answer:
It looks like a big V.
Is this for a Pressure-temperature or a volume-temperature graph of a gas (with temperature on the x axis)? IF so,
Several readings of either pressure or volume of the gas is taken at different temperatures that can be measured, (eg, 10 C, 20C, ... 70C) This can then be plotted on a graph. The line is then extrapolated towards the negative x-axis to find the x intercept, where both pressure and volume are 0. This point is the value of absolute zero.
You must also consider the fact that we are assuming that the graph is one for an ideal gas, and as such no gas exists, the value might differ from the exact one...
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