Search found 8 matches
- 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
- 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.
- 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.
- 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.
- 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
- 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
- Fri Jan 10, 2020 10:58 am
- Forum: Administrative Questions and Class Announcements
- Topic: Required number of responses for chem community
- Replies: 7
- Views: 54
- 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?