a link to the data sheet.
Actual numbers and a discussion of correct precision and significant figures
foR this lab, with general APPlIcationS, will be posted soon.
Objective---To measure pressure as a function of temperature and to extrapolate to absolute zero.
reference---Ch. 13. See section 13-6.
See the Gay-Lussac’s Law, page 363,
which assumes volume V is constant. See figure 13-13 (a), but assume the
vertical axis is pressure P instead and that the volume is constant. In other
words, assume the straight line is a graph of P vs T. Check out the T intercept !
Pressure gauge Long and short rod
2 Thermometers Rod clamps
thermometer, measure the temperature of the room. Turn on the electric range
to high. Observe the rise in the temperature of the water. When the temperatures reaches
room temperature, record T1 and P1. In the
pressure measurement, your error in a single
at the gauge to record the least count.
Thus you must subtract or add the magnitude of the difference between the room temperature
reading T1 ands reading and atmospheric pressure PATM, in PSI (pounds per square inch.) . If
the initial reading is above PATM , then you must subtract; if the initial reading is below PATM ,
you must add.
measurement of 0.3 psi.
|9. FInally, can you think of a way to get better agreement between the hand computation and excel ? Is there a better choice for t1 and P1 that is not necessarily a data point? Check back soon for a hint to the answer!|
Questions (4 points
each.) Short answers.
2. What is the lowest achieved temperature in Kelvin ? The answer is not zero. Please site your internet reference and explain in a paragraph how the lowest achieved temperature was achieved, using known concepts from our studies to date.
3. Compute the product of the numerical answer to the last question and the temperature of the interior of the sun? (i.e. What answer do you get when you multiply them together?) Please site sources for additional data used.
4. You have a sample of H2Ohat happens at the triple point of water in terms of the first three phases of matter, solid, liquid and gas ? If you increase the pressure from the pressure value of the triple point, which phase increases its presence in the H2O sample, solid, liquid or gas?
5. What is the approximate value of the triple point temperature in 0C to the nearest hundredth place?
6. What is the
letter of the correct answer? The temperature of 1 cup of water is 25 0C. The temperature of 30 gallons of water is 25 0C.
The average kinetic energy of the molecules in the cup is