sandlermisc 0.3.2

Miscellaneous utilities from Chemical, Biochemical, and Engineering Thermodynamics (5th edition) by Stan Sandler

Sandlermisc

Miscellaneous utilities from Sandler's 5th ed.

Sandlermisc implements a python interface to a few miscellaneous utilities from Chemical, Biochemical, and Engineering Thermodynamics (5th edition) by Stan Sandler (Wiley, USA). It should be used for educational purposes only.

Current utilities:

1. GasConstant -- a unit-specific implementation of the universal gas constant
2. Thermals -- ideal-gas calculations of ΔH and ΔS

Installation

Sandlermisc is available via pip:

pip install sandlermisc

Usage

API

GasConstant() expects two optional argurments: the pressure units (default Pascal, or "pa") and the volume units (default cubic meter, or "m3"). It returns an object that can be used like a float.

>>> from sandlermisc.gas_constant import GasConstant
R = GasConstant() # J/mol-K
>>> print(R)
8.31446 (pa-m3)/(mol-K)
>>> print(float(R))
8.31446261815324
R_pv = GasConstant("bar", "m3") # bar-m3/mol-K
>>> print(R_pv)     
8.31446e-05 (bar-m3)/(mol-K)
>>> print(float(R_pv)) 
8.31446261815324e-05
>>> R_pv = GasConstant("atm", "l")  
>>> print(R_pv)        
0.0820574 (atm-l)/(mol-K)
>>> print(float(R_pv))
0.08205736608095968

DeltaH_IG requires the temperature of state 1, the temperature of state 2, and an ideal-gas heat-capacity argument, which can be a scalar, four-element list of floats, or four-element dict with keys a, b, c, and d.

>>> from sandlermisc.thermals import DeltaH_IG
>>> DeltaH_IG(100, 200, 10)
1000.0
>>> DeltaH_IG(500, 600, [10., 0.01, 0.00002, 0.000000032]) 
2693.466666666667
>>> DeltaH_IG(500, 600, dict(a=10., b=0.01, c=0.00002, d=0.000000032)) 
2693.466666666667

DeltaS_IG requires the temperature and pressure of state 1, the temperature and pressure of state 2, the ideal-gas heat-capacity argument, and a GasConstant instance.

>>> from sandlermisc.thermals import DeltaS_IG 
>>> DeltaS_IG(500, 10, 600, 12, 10)                
0.30730979949270765

One can optionally provide a value for the gas constant R to match units of one's Cp, if necessary. By default, sandlermisc assumes Cp has energy units of J.

Release History

• 0.3.2
  • bugfix: unpackCp ignored ints -- now fixed
  • bugfix: unpackCp ignored np.ndarray -- now fixed
• 0.3.0
  • StateReporter implemented
• 0.1.1
  • bug in converting Cp
• 0.1.0
  • Initial release

Meta

Cameron F. Abrams – [e-mail]

Distributed under the MIT license. See LICENSE for more information.

https://github.com/cameronabrams

Contributing

1. Fork it (https://github.com/cameronabrams/sandlermisc/fork)
2. Create your feature branch (git checkout -b feature/fooBar)
3. Commit your changes (git commit -am 'Add some fooBar')
4. Push to the branch (git push origin feature/fooBar)
5. Create a new Pull Request