Thermodynamics Should DIe

Question 1

Total Change in Energy

Answer 1

Delta E = q + w

Question 2

1 cal =

Answer 2

4.184 J

Question 3

1 L atm =

Answer 3

101.3 J

Question 4

1 kW h =

Answer 4

3.60 x 10^6 J

Question 5

1 kcal =

Answer 5

1 Cal = 1000 cal

Question 6

Quantifying Heat

Answer 6

q = (m)(Cs)(Delta T)

m = mass (g)
Cs = Specific Heat ( J/ g C)
Delta T = Final temp - Initial Temp (Degrees C)

Question 7

Quantifying Work

Answer 7

W = -P(ext) x Delta V

P(ext) = External Pressure (atm)
Delta V = Final Vol. - Initi. Vol. (L)

Question 8

BOMB Calorimetry

Answer 8

Measuring Delta E (rxn)

q(cal) = C(cal) x Delta T

q(cal) = -q(rxn) = Delta E(rxn)

Question 9

COFFEE CUP Calorimetry

Answer 9

Measuring Delta H(rxn)

q(soln) = m(soln) x C(s, soln) x
Delta T

IF HEAT NOT LOST:
q(soln) = -q(rxn) = Delta H(rxn)

IF HEAT IS LOST:
q(rxn) = -[q(soln) + q(cal)]

Question 10

Frequency =

Answer 10

Freq (v) = c / wavelength

Question 11

Wavelength =
(from momentum)

Answer 11

Wavelength = h /(m x v)

m = mass in KG
v= velocity in m/s

h = Planck’s constant