Lectures: Test 3 Flashcards
What are the three quantum numbers and what do they each tell you?
- Principal quantum number (n): energy state / distance from the nucleus that the electron is.
- Angular momentum: type of orbit the electron has
- Magnetic quantum number: orientation of the orbit.
What is the relationship between the total change in a system’s internal energy and the energy transferred as heat and/or work?
∆E = q + w
In terms of energy of reactants and products, the change in internal energy of a system is _____
∆E = E_f - E_i = E_products - E_reactants
The first law of thermodynamics says _____.
∆E_system + ∆E_surroundings = 0
The relationship between work, pressure, and change in volume is given by _____
w = -P∆V
Enthalpy is defined as _____
H = E + PV
Change in enthalpy in terms of changes in internal energy, pressure, and change in volume, is given by _____
∆H = ∆E + P∆V
Heat capacity is given by _____
C = q/∆T
Heat absorbed / released, in terms of specific heat capacity, mass, and change in temperature, is given by _____
q = cm∆T
Molar heat capacity is given by _____
C_m = q/( (amount) (∆T) )
For calorimetry problems, q_rxn is related to q_calorimeter by _____.
-q_rxn = q_calorimeter
q_calorimeter in terms of heat capacity of the calorimeter and change in temperature is _____.
q_calorimeter = (C_calorimeter) (∆T_calorimeter)
Hess’s Law says _____
∆H_overall = ∑∆H
How is the standard enthalpy of a reaction found?
∆H˚rxn = ∑ n_p ∆H˚(f, p) - ∑ n_r ∆H˚_(f, r)
De Broglie’s equation says _____
Wavelength = h/(mu), where m is mass, u is speed, and h is Planck’s constant.
