Chapter_15

Chapter_15 - Test bank

This preview shows pages 1–9. Sign up to view the full content.

Chapter 15 Thermal Properties of Matter

This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document
a z X An atom is described by an atomic mass a and an atomic number z a determines the mass of the atom ( in u) 1 u = the mass of one proton or neutron= g 24 10 66 . 1 The mass of 1 mole of the substance X = a (g) 1 mole of the substance X = A N atoms of X mole atoms N A 23 6.02 number s Avogadro' 1- Avogadro’s number and mole
number s Avogadro' atoms of number Total A N N n s mass molar atom m The number of moles n : The mass of an atom:

This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document
2- Equations of State • Experimental observations: T is constant: P inversely proportional to V P is constant: V directly proportional to T V is constant: P directly proportional to T Establishment of an empirical law for ideal gas
Macroscopic description of an ideal gas • Equation of state: nRT PV Kelvin in e Temperatur T mol.K J 8.31 constant gas universal R moles of number mass molar sample of mass n m Volume V Pa Pressure 3 P

This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document
Boltzmann constant number s Avogadro' atoms of number Total A N N n RT N N nRT PV A T Nk B K J k N B 23 A 10 38 . 1 N R constant s Boltzman' molecules of Total
Concept test What happens to the size of vapor bubbles in a pot of boiling water as they move up towards the surface of the water (T=cst): 1. It decreases 2. It remains the same 3. It increases 3. Considering that the temperature is the same every where in the pot, the size of the bubbles increase because as the bubble moves up the pressure of the fluid decreases: V P nRT V

This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document
PT plots PV diagram • It proves especially useful to plot pressure and volume at constant temperature for a range of temperatures. In this way we can generate a 3-D surface of isothermal lines and make predictions of an ideal gas’s behavior.
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

Page1 / 39

Chapter_15 - Test bank

This preview shows document pages 1 - 9. Sign up to view the full document.

View Full Document
Ask a homework question - tutors are online