3rd Weeks Lessons

Question 1

What is the principle of conserving energy

Answer 1

Energy cannot br created and destroyed, it can only be transfered

Question 2

Energy balance for a stationary system

Answer 2

Ein - Eout = [triangle]U

Question 3

Enthalpy

Answer 3

Imaginary formula to calculate smthing in a system with volume constant. H = U + PV

Question 4

Constant volume

Answer 4

Cv = du/dT

Question 5

Constant pressure

Answer 5

dh/dT

Question 6

What is very important to set on the 4 kinds of processes?

Answer 6

Determine the constants and determine what is the ratio. Using the equation of state PV = mRT

Question 7

Formulas for Work in processes

Answer 7

W = P[triangle]v
W = R[triangle]T

Question 8

Formula that you can use ANYTIME

Answer 8

[triangle]u = Cv * [triangle]T

Question 9

What does K stand for

Answer 9

Specific heat ratio = Cp/Cv

Question 10

What is R

Answer 10

R = Cp - Cv

Question 11

In an Isobaric process the 3 essential formulas

Answer 11

du = Cv * dT
W = R * dT
q = Cp * dT

Question 12

In an Isochoric process the essential formuals are….

Answer 12

q = Cv * [triangle]T
W = 0

Question 13

In an Isothermal process…

Answer 13

DeltaU is 0 because there is no temperature change. U = f(T)