Thermodynamics Of Materials

Question 1

State the equation for change in internal energy of a system with temperature and workflows

Answer 1

U = Q - W
dU = (delta)Q - (delta)W

Question 2

How does heat transfer occur in a fluid

Answer 2

Diffusing particles carry their kinetic energy

Question 3

Why does viscosity exist in a fluid

Answer 3

Diffusing particles carry their momentum

Question 4

What did extensive mean with respect to entropy?

Answer 4

Entropy’s extensive properties means that the entropy of two combined systems surge entropy S1 and S2 is S1+ S2

Question 5

Define S in terms of microstates

Answer 5

S = kb * ln([Omega])
[Omega] = number of microstates

Question 6

What is the Stirling approximation?

Answer 6

For large n, ln(n!) =~ n*ln(n) - n