Hi, I have a couple of questions for my general knowledge because I have a test coming up and I'm confused on some stuff(adsbygoogle = window.adsbygoogle || []).push({});

1) For an isothermal process is the [tex]\Delta[/tex]S=0 because [tex]\Delta[/tex]T=0?

since it equals zero does that mean that the process is irreversible?

2)What makes a process reversible? is that when the [tex]\Delta[/tex]S>0?

3)In an adiabatic process, pV^{[tex]\gamma[/tex]}=const. means that it equals a constant value not it is constant because if the temperature changes then the pressure and volume or one of them has to change right? But I dont understand how that is constant when Q=0, but then when [tex]\Delta[/tex]T=0, just PV is constant, wouldn't what I had earlier be constant at [tex]\Delta[/tex]T=0 too?

4) In an adiabatic process when I use p_{i}V_{i}^{[tex]\gamma[/tex]}=p_{f}V_{f}[tex]\gamma[/tex], means that I can just find the final pressure or the volume after the process occurs?

5)Similarly what does this mean? T_{H}V_{i}^{[tex]\gamma[/tex]-1}=T_{L}V_{f}^{[tex]\gamma[/tex]-1}

and if I was only given the heat transfer Q_{H}and Q_{L}could I substitute that in for T_{H}and T_{L}?

6)In an Isochoric process, the volume is constant, so to find Q or [tex]\Delta[/tex]U, I can use either =nC_{v}[tex]\Delta[/tex]T or =3/2nR[tex]\Delta[/tex]T?

7)In an Isobaric process, constant pressure, does [tex]\Delta[/tex]U=Q? Is this correct Q=mc[tex]\Delta[/tex]T or [tex]\Delta[/tex]U=nC_{v}[tex]\Delta[/tex]T? or do I use something with C_{p}like [tex]\Delta[/tex]U=nC_{p}[tex]\Delta[/tex]T?

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# Thermodynamics Concepts

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