Insights Blog
-- Browse All Articles --
Physics Articles
Physics Tutorials
Physics Guides
Physics FAQ
Math Articles
Math Tutorials
Math Guides
Math FAQ
Education Articles
Education Guides
Bio/Chem Articles
Technology Guides
Computer Science Tutorials
Forums
Intro Physics Homework Help
Advanced Physics Homework Help
Precalculus Homework Help
Calculus Homework Help
Bio/Chem Homework Help
Engineering Homework Help
Trending
Featured Threads
Log in
Register
What's new
Search
Search
Search titles only
By:
Intro Physics Homework Help
Advanced Physics Homework Help
Precalculus Homework Help
Calculus Homework Help
Bio/Chem Homework Help
Engineering Homework Help
Menu
Log in
Register
Navigation
More options
Contact us
Close Menu
JavaScript is disabled. For a better experience, please enable JavaScript in your browser before proceeding.
You are using an out of date browser. It may not display this or other websites correctly.
You should upgrade or use an
alternative browser
.
Forums
Homework Help
Introductory Physics Homework Help
Air is compressd in a cylinder
Reply to thread
Message
[QUOTE="Karol, post: 4965831, member: 20512"] [h2]Homework Statement [/h2] At the start of the compression stroke, the cylinder in a diesel motor contains 300[cm[SUP]3[/SUP]] of air at atmospheric pressure and 27[SUP]0[/SUP]C, and at the end of the stroke the volume is 20[cm[SUP]3[/SUP]] and manometric pressure 41[atm]. What is the temperature. [h2]Homework Equations[/h2] $$PV=nRT\rightarrow \frac{P_1V_1}{T_1}={P_1V_2}{T_2}$$ In an adiabatic process: ##T_1V_1^{\gamma-1}=T_2V_2^{\gamma-1}## And: ##P_1V_1^{\gamma}=P_2V_2^{\gamma}## γ for air=1.4 [h2]The Attempt at a Solution[/h2] First i check if this is an adiabatic process by comparing the initial and final volumes and pressures: $$T_1V_1^{\gamma-1}=1\cdot 300^{1.4}=2937$$ $$T_2V_2^{\gamma-1}=42\cdot 20^{1.4}=2784$$ So it's not, heat leaks. So i calculate using the equation of state: $$\frac{P_1V_1}{T_1}={P_1V_2}{T_2}\rightarrow \frac{1\cdot 300}{300}=\frac{42\cdot 20}{T_2}\rightarrow T_2=840^0K$$ Is my method true? [/QUOTE]
Insert quotes…
Post reply
Forums
Homework Help
Introductory Physics Homework Help
Air is compressd in a cylinder
Back
Top