Excellent on Android under termux

[defencedog]

Working great for me. Attaching android built for armx32 remove .txt chemics-24.1-py2.py3-none-any.whl.txt

Syntax have changed, can author guide me in following script

chemic_gasrho.py.txt

[wigging]

I'm not sure what the issue is here. Please explain what you need help with and what errors you are getting. And please post the actual code in the issue instead of linking to a file.

[defencedog]

OK as per your latest syntax this is my code: A small calculator on termux termimal

import chemics as cm

formula = input("Chemical Formula e.g CH4, H3N, ClH = ")
press = float(input("Process pressure kPaA = "))
temp = float(input("Process temperature degC = "))

p = press*1000      # Absolute pressure [Pa]
tk = temp+273.15    # temperature of gas [K]

gas = cm.Gas(formula, tk, p)
mw = gas.molecular_weight
rho = gas.density()
cp = gas.heat_capacity()
k = gas.thermal_conductivity()
mu = gas.viscosity() / 1000

print(f'\n{formula} gas properites')
print(f'molecular weight      {mw:.2f} g/mol')
print(f'density               {rho:.3f} kg/m³')
print(f'heat capacity         {cp:.3f} J/(mol⋅K)')
print(f'thermal conductivity  {k:.3f} W/(m⋅K)')
print(f'viscosity             {mu:.3f} cP')
print('Note: in SI units 1 cP = 10⁻³ Pa⋅s = 1 mPa⋅s')

Now if input formula as H2 ....following error happens. This doesn't happen in case the str is Cl2 (Chlorine)

Chemical Formula e.g CH4, H3N, ClH = H2
Process pressure kPaA = 130
Process temperature degC = 20
Traceback (most recent call last):
  File "/storage/emulated/0/Download/jnotebooks/chemic_gasrho.py", line 13, in <module>
    cp = gas.heat_capacity()
  File "/data/data/com.termux/files/usr/lib/python3.9/site-packages/chemics/gas.py", line 176, in heat_capacity
    row = _get_row("data/gas-cp-yaws.csv", self.formula, self.cas_number)
  File "/data/data/com.termux/files/usr/lib/python3.9/site-packages/chemics/gas.py", line 37, in _get_row
    raise ValueError(m)
ValueError: Multiple substances available for H2. Include CAS number too.

It's working

Chemical Formula e.g CH4, H3N, ClH = Cl2
Process pressure kPaA = 130
Process temperature degC = 40

Cl2 gas properites
molecular weight      70.90 g/mol
density               3.540 kg/m³
heat capacity         34.178 J/(mol⋅K)
thermal conductivity  0.010 W/(m⋅K)
viscosity             0.141 cP
Note: in SI units 1 cP = 10⁻³ Pa⋅s = 1 mPa⋅s

[wigging]

Giving the CAS number for hydrogen will fix your problem.

import chemics as cm
gas = cm.Gas("H2", 313, cas_number="1333-74-0")

[defencedog]

@wigging Can we somehow query CAS for the input str? If the lib can understand CAS it must have a database for it.

[wigging]

Can we somehow query CAS for the input str? If the lib can understand CAS it must have a database for it.

Submit this as an idea in the Discussions tab. I would like to discuss it more. Might be a good feature to add to the package.