Search found 8 matches

by KC Madigan 1J
Sun Feb 02, 2020 10:57 pm
Forum: Thermodynamic Systems (Open, Closed, Isolated)
Topic: expansion work
Replies: 4
Views: 35

Re: expansion work

The force opposing expansion is the force pushing against the piston when it is expanding. It is the weight of the piston and the external air pressure
by KC Madigan 1J
Sun Feb 02, 2020 10:51 pm
Forum: Concepts & Calculations Using First Law of Thermodynamics
Topic: expansion
Replies: 5
Views: 35

Re: expansion

The volume of a system is increased.
by KC Madigan 1J
Sun Feb 02, 2020 10:49 pm
Forum: Thermodynamic Systems (Open, Closed, Isolated)
Topic: Constant pressure vs constant volume
Replies: 1
Views: 24

Re: Constant pressure vs constant volume

Systems with constant pressure are open and systems with constant volume are closed. A calorimeter with constant pressure would be considered an open system. Bomb calorimeters are considered isolated systems.
by KC Madigan 1J
Sun Feb 02, 2020 10:45 pm
Forum: Concepts & Calculations Using First Law of Thermodynamics
Topic: First law of thermodynamics
Replies: 3
Views: 23

Re: First law of thermodynamics

It's saying that heat is a form of energy, therefore the principle of conservation of energy applies to it.
by KC Madigan 1J
Sun Feb 02, 2020 10:42 pm
Forum: Phase Changes & Related Calculations
Topic: enthalpy change
Replies: 2
Views: 24

Re: enthalpy change

I believe you are correct
by KC Madigan 1J
Fri Jan 10, 2020 10:59 am
Forum: Ideal Gases
Topic: Textbook Help
Replies: 4
Views: 73

Re: Textbook Help

You should get an email with a link to access online materials after your purchase
by KC Madigan 1J
Tue Nov 27, 2018 2:40 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Homework help: Polar vs Nonpolar
Replies: 1
Views: 36

Homework help: Polar vs Nonpolar

For problem 2E.25 in the seventh edition, the solution manual states that molecule b is polar. I understand the C-Cl bonds are polar, but does the tetrahedral shape not cancel these out? Also, how is the molecule in part d nonpolar?

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