TP2 graph: Tips on graphing

For this graph that you are generating for next week, keep all the digits.

You need to convert all the temperature readings to Kelvin, so add 273.15. (Keep all digits) You need to take the inverse of temperature readings that have been converted to Kevin. (Keep all digits) You need to take the natural . . . → Read More: TP2 graph: Tips on graphing

DUE: Lab 1

T & P 2 – Rotary evaporator, Precipitation, Gravity Filtration and Graphing

Read the following:

T & P 2 – Rotary Evaporator, Precipitation, Gravity Filtration, Graphing Demonstrations of Nine Practical Lab Techniques – Techniques 6 and 9

We will be working on Techniques 6 and 9. Read through the lab carefully before coming to the lab.

Where is the error in the “ln P Vs. 1/T” graph? Consider statistical errors (2 of 2)

From page 1, we learned that if we believe the temperatures were poorly measured, it would lead to the determination of ΔHvap of water to 2 significant figures.

But the graph of the data shows a very good fit of the data to a straight line ( R2= 0.998), so maybe the temperature measurements . . . → Read More: Where is the error in the “ln P Vs. 1/T” graph? Consider statistical errors (2 of 2)

Where is the error in the “ln P Vs. 1/T” graph? Consider measurements errors (1 of 2)

Take a look at the two-column data.

T (oC) P (kPa) 0 0.612 10 1.227 20 2.536 30 4.242 40 7.37 50 12.33 60 19.9 70 31.15 75.7 46.12 89.7 70.1 100 101.32 120 198.5 200 1554.3

If we look closely at the data and pay attention to where the uncertainties are, we can . . . → Read More: Where is the error in the “ln P Vs. 1/T” graph? Consider measurements errors (1 of 2)