What is the third law of thermodynamics ? What are standard entropy values, S° , and how are these S° values (listed in Appendix 4) used to calculate ∆ S ° for a reaction? How would you use Hess’s law to calculate ∆ S ° for a reaction? What does the superscript ° indicate? Predicting the sign of ∆ S ° for a reaction is an important skill to master. For a gas-phase reaction, what do you concentrate on to predict the sign of ∆ S °? For a phase change, what do you concentrate on to predict the sign of ∆ S °? That is, how are S solid ∘ , S liquid ∘ , and S gas ∘ related to one another? When a solute dissolves in water, what is usually the sign of ∆ S ° for this process?
What is the third law of thermodynamics ? What are standard entropy values, S° , and how are these S° values (listed in Appendix 4) used to calculate ∆ S ° for a reaction? How would you use Hess’s law to calculate ∆ S ° for a reaction? What does the superscript ° indicate? Predicting the sign of ∆ S ° for a reaction is an important skill to master. For a gas-phase reaction, what do you concentrate on to predict the sign of ∆ S °? For a phase change, what do you concentrate on to predict the sign of ∆ S °? That is, how are S solid ∘ , S liquid ∘ , and S gas ∘ related to one another? When a solute dissolves in water, what is usually the sign of ∆ S ° for this process?
Solution Summary: The author explains that thermodynamics is associated with heat, temperature and its relation with energy and work. The term "S" is the standard entropy value of a substance.
What is the third law of thermodynamics? What are standard entropy values, S°, and how are these S° values (listed in Appendix 4) used to calculate ∆S° for a reaction? How would you use Hess’s law to calculate ∆S° for a reaction? What does the superscript ° indicate?
Predicting the sign of ∆S° for a reaction is an important skill to master. For a gas-phase reaction, what do you concentrate on to predict the sign of ∆S°? For a phase change, what do you concentrate on to predict the sign of ∆S°? That is, how are
S
solid
∘
,
S
liquid
∘
, and
S
gas
∘
related to one another? When a solute dissolves in water, what is usually the sign of ∆S° for this process?
Science that deals with the amount of energy transferred from one equilibrium state to another equilibrium state.
Part A
2K(s)+Cl2(g)+2KCI(s)
Express your answer in grams to three significant figures.
Part B
2K(s)+Br2(1)→2KBr(s)
Express your answer in grams to three significant figures.
Part C
4Cr(s)+302(g)+2Cr2O3(s)
Express your answer in grams to three significant figures.
Part D
2Sr(s)+O2(g) 2SrO(s)
Express your answer in grams to three significant figures.
Thank you!
A solution contains 10-28 M TOTCO3 and is at pH 8.1. How much HCI (moles per liter of
solution) is required to titrate the solution to pH 7.0? (H2CO3: pKa1=6.35, pKa2=10.33)
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The Laws of Thermodynamics, Entropy, and Gibbs Free Energy; Author: Professor Dave Explains;https://www.youtube.com/watch?v=8N1BxHgsoOw;License: Standard YouTube License, CC-BY