Physical Chemistry Answers

Consider a voltaic cell based on the following reaction:

Fe (s) + Cu2 + (aq) ⟶ Fe2 + (aq) + Cu (s)

If [Cu2 +] = 0.72 M, what must [Fe2 +] be to increase cell E by 0.65 V above cell E at 25 ° C?

A gas is compressed isothermally at 400K, from 0.3Mpa to 4Mpa is then cooled isobarically to 290K. After that it is expanded adiabatically to 0.9 Mpa. Later expanded at constant temperature to the initial value of pressure. Finally heated isobarically to 400K. Draw the PV diagram and calculate the overall work done, change in internal energy and heat supplied. Data: Cp 3.7R and C=2.7R.

made two parts and the tyndall effect cannot be observed

β-carotene is the most important vitamin A. Its molar mass can be
determined by measuring the osmotic pressure generated by a given
mass of β-carotene dissolved in the chloroform solvent. Calculate the molar mass
and β-carotene if 10.0 mL of a solution containing 0.00768 g of β-carotene
it has an osmotic pressure of 0.035 atm at 25 °C. Consider that the constant of
ideal gases R is 0.082057 L.atm/K.mol.

The weight of a rock is measured to be 0.055 lbs. After placing the rock in a graduated cylinder containing 13.99 mL of water, the new measurement is 29.51 mL. Calculate the density of the rock in g/mL.

2.25 moles of an ideal gas at 35.6oC expands isothermally from an initial volume of 26.0 dm3

to a

final volume of 70.0 dm3

. Calculate w for this process (a) for expansion against a constant external

pressure of 1.00 x 105 Pa and (b) for a reversible expansion

Construct a vis-à-vis comparison of different alloyed materials. Cite the

advantages, disadvantages, and its best application