Submitted by: Submitted by smya
Views: 10
Words: 493
Pages: 2
Category: Business and Industry
Date Submitted: 11/17/2015 05:49 PM
1- What is the main type of energy transferred in isothermal compression or expansion?
- Heat energy
2- True or False: Work is the main type of energy transferred when two objects become in thermodynamic equilibrium.
- False
3- Use dimensional analysis on Newton’s second law to determine the units that 1 N equals. Do the same with the ideal gas law to determine the units that 1 Pa equals.
1N = 1kg m/s2 ( 1N = 1M L/T2 …. 1Pa = 1N/m2 ( 1Pa = 1kg m/m2s2 (1Pa = 1M/LT2
4, 5-
|User Defined, Ch A, Run #1 |User Defined, Ch B, Run #1 |User Defined, Ch C, Run #1 |
|Time ( s ) |User Defined ( kPa ) |Time ( s ) |User Defined ( cm^3 ) |Time ( s ) |User Defined ( K ) |
1 |104.235 | |1 |240.425 | |1 |297.94 | | |1.1 |106.022 | |1.1 |238.188 | |1.1 |298.457 | | |1.2 |117.577 | |1.2 |221.256 | |1.2 |302.887 | | |1.3 |136.279 | |1.3 |192.483 | |1.3 |310.595 | | |1.4 |153.85 | |1.4 |172.561 | |1.4 |318.602 | | |1.5 |180.892 | |1.5 |146.798 | |1.5 |326.985 | | |1.6 |183.81 | |1.6 |136.857 | |1.6 |331.277 | | |1.7 |170.468 | |1.7 |136.837 | |1.7 |326.131 | | |average |144 | | |185.7 | | |314.1 | | |
Using the data that was collected for the pressure, volume and temperature during the adiabatic compression stroke, determine an approximation of the number of air molecules present in the cylinder. P=144kPa(1atm/1000kPa) = .144atm .. V=185.7cm=.1857L R= 0.0821Latm/molK T=314.1K
PV=nRT ( n=PV/RT ( n=(.144)(.1857)/(0.0821)(314.1) = (0.027)/(25.8)=1.05x10-3 moles
Use Excel to make a plot of the product of pressure and volume, PV, vs. the temperature, T. Make sure you only use data from the portion of the data collection that occurred during the adiabatic compression. The ideal gas law is:
PV=NkT
[pic]
Comparing this to y=mx+b, you can see that PV is directly proportional to T. The plot of PV vs. T should be fairly linear. From a linear fit...