#!/usr/bin/env python
# coding: utf-8

# ChEn-1070: Introduction to Chemical Engineering Spring 2019 UMass Lowell; Profs. Manohar and de Almeida **30Apr2019**
# 
# # Laboratory Work 11 30Apr2019
# 

# ### Name: `your name`

# ### Rubric for each assignment: 
# 
# |         Context                    |  Points |
# | -----------------------     | ------- |
# | Precision of the answer     |   80%   |
# | Answer Markdown readability |   10%   |
# | Code readability            |   10%   |
#     

# ### <span style="color:red">Guidance:</span>
#  +  <span style="color:red"> 
#     Save your work frequently to a file locally to your computer.
#     </span>
#  +  <span style="color:red">
#     During your work and before submitting the final version do: `Kernel` -> `Restart & Run All`, to verify your notebook runs correctly.
#     </span>
#  +  <span style="color:red">
#     Save your file again.
#     </span>

# ## <span style="color:blue">Assignment 1 (100 pts).</span>
# ### <span style="color:blue">Using `scipy.constants`, `mendeleev`, and a `for` loop solve the mass transfer problem: </span>

# <span style="color:blue"> A circular, thin film with radius of 20 ft shrinks at a rate of </span>
# 
# $\dot{r} = -3.7 \mu\!\,m/s$
# 
# <span style="color:blue"> The film is saturated with water at a concentration of 0.002 gmol/L and the mass transfer coefficient is h = 0.5 in/s. If the film is exposed to dry air make a plot of the water removal in moles per minute for the first half hour. </span>
# 
# <span style="color:blue"> Use the overall masss transfer formula for film exposed to air with no water vapor. </span>

# <span style="color:blue">
#   + Plot your results as follows:
# </span>

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