CHE3161 week 4

How many types of multivariable calculus you have learnt today?

• 5

• 4

• 3

• 2

How you like that?

• Great, it can be used to solve thermodynamic questions

• *Dance

• 
• 

How to relate Internal energy to Helmholtz energy?

• Through temperature

• Through pressure

• Can't do that

• Through volume

Is Cp always constant?

• Yes

• No

• Not sure

How do we find enthalpy when Cp is not constant?

• Integration

• Differentiation

• Assume Cp is constant

• We cannot find enthalpy in that case

How do we further relate U, H, A, G other than calculus?

• More advanced geometry

• Maxwell relation

• 
• Apply pressure to the equation

What is the purpose of all those hassle derivations?

• Scientist wanted to give problem to other humans

• To relate thermodynamic properties to easily measureable variables

• So that the thermodynamic properties can be estimated easily based on novel methods

• 

How do we calculate the change in thermodynamic properties over a change in pressure and temperature?

• Based on partial derivation, first calculate the change in one variable, then another

• Relate the properties to their ideal gas condition

• Good morning

• Make use of equations of state

If you were to calculate the entropy of a stone (on the floor) that went upward to a height of Z1, what would the entropy be?

• = 0

• >0

• < 0

• ≠ 0

How many terms are there in this virial equation?

• 2

• 3

• 4

• 5