Find ∆H and ∆S for the following data.
Calculate percent errors for the enthalpy and entropy of
reaction using the following literature values: ∆H = 110 kJ/mol, ∆S
= 380J/mol*K
Standardized HCl = .5087M
Ksp = [Na^+]^2[Borox^2-]
ln(Ksp) = -∆H/RT + ∆S/R
Temperature of solution;Amount of HCl needed to titrate
borox;Volume aliquot
Trial 1 - 295K;2.50mL;5.8mL
Trial 2 - 316K;5.76mL;5.4mL
Trial 3 - 309K;4.57mL;5.6mL
Trial 4 - 305K;4.34mL;6.5mL
Trial 5 - 311K;7.70mL;5.8mL
Trial 6 - 310K;7.73mL;6.1mL
After I calculated everything...
Working from first principles, derive an expression for the
stagnation temperature of a perfect gas, in terms of flight
velocity, specific heat at constant pressure and the ambient
temperature.
To derive the ideal-gas equation, we assume that the volume of
the gas atoms/molecules can be neglected.
Given the atomic radius of krypton, 1.1 Å, and knowing that a
sphere has a volume of 4πr3/3, calculate the fraction of space that
Kr atoms occupy in a sample of krypton at STP. Express your
answer using two significant figures.
(1) What do you assume the
entropy S for a perfect crystal when T = 0?
(2) Is the S(0) still zero
if the crystal is not perfect? Why?
(3) How to calculate dS
when under the constant pressure and cp is given?
(4) How to calculate the
entropy of H2O at 500 K?
(5) How to calculate the
entropy change for a chemical reaction if you can find the S for
each chemical?
(6) For an
isolated thermodynamic system,...
1.
Set-up the appropriate differential equation(s) and solve to
derive the general equation of motion for a human sized “dummy”
moving vertically (up/down) under the following assumptions:
(a)The initial elevation is h0 ft.
(b)The initial velocity is V0 ft./sec.
(c)All motion vertical (ignore any sideways motion).
(d)The force due to wind is proportional to velocity and in the
opposite
direction of velocity.
(e)The “terminal velocity” is 120mph (e.g. lim
t→∞ (V)= 120 mph).
(f)Force = Mass * Acceleration.
(g)Acceleration due to...