How Does Mercury's Compression Affect Heat Transfer and Energy?

Join the discussion
Ask a follow-up here, or get your own question answered by working scientists, mathematicians and engineers — people, not an autocomplete.
Real named experts · corrections over time · the nuance an AI answer skips
2 replies · 2K views
Winzer
Messages
597
Reaction score
0

Homework Statement


The pressure on 0.01 litres of mercury is increased reversibly and isothermally
from zero to 1000 atm at room temperature (293 K). Mercury has a coefficient
of volume expansion β = 1.82 × 10−4 K−1 , and an isothermal compressibility
κT = 4.02 × 10−11 Pa−1 . Note: 1 atm= 1.013 × 105 Pa. Assuming that the
volume, V , changes very little, find
(i) how much heat is transferred in the compression;
(ii) the work done during the compression;
(iii) the change in internal energy.

Homework Equations


[tex]T dS= C_p dT -\beta V dP[/tex]
[tex]\oint \frac{\def\dbar{{\mathchar'26\mkern-12mu d}Q} <br /> \dbar}{T}=0[/tex]
[tex]\def\dbar{{\mathchar'26\mkern-12mu d}Q} <br /> \dbar=C_v dT[/tex]

The Attempt at a Solution


I am attempting to find the final temp so I can implement: [tex]\def\dbar{{\mathchar'26\mkern-12mu d}Q} <br /> \dbar=C_v dT[/tex]

Since the process is reversible, and under a complete cycle [tex]\oint \frac{\def\dbar{{\mathchar'26\mkern-12mu d}Q} \dbar}{T}=0[/tex] I set [tex]dS=0[/tex]. Getting [tex]C_p \int \frac{dT}{T}=\beta T V \int dP[/tex] Is this correct so far?
 
Physics news on Phys.org
I'd start with the first law.