Physical Chemistry Answers

calculate the entropy of a system

having 6.9 x 10¹⁰ microstates.

For the equilibrium 

 2SO₂(g)+O₂(g) 2SO₃(g) K_c=245 (at 100 K) 

 The equilibrium concentrations are [SO₂]=0.204 M,[O₂]=0.0264 M and 

[SO_3]=0.368 M. Suppose that the concentration of SO₂ is suddenly halved calculate 

Q_c.

The enthalpy of formation of NH₃(g) as per the following reaction is -46.11 kJ/mol

at 298 K.

N₂(g) + 3H₂ (g) --> 2NH₃(g)

Calculate the value of enthalpy of formation of NH₃(g) at 100 °C. The C_p

values are given as: N₂(g) = 29.12; H₂(g) = 28.82; NH₃(g) = 35.06. Assume the

given heat capacity values to be temperature independent in the range.

192 J of heat was supplied to a thermodynamic system and its internal energy was

found to decrease by 22 J. Calculate the amount of associated work and state

whether the work was done by the system or done on the system?

What is the minimum number of Calories expended by a 72.6 kg person who climbs a 30-story building? (Assume each flight of stairs is 14 ft high.) How many grams of glucose are required to supply this amount of energy? 

What quantity of heat energy is released when 455 g of liquid water freezes?

The decrease in the work function A for process at constant temperative  gives ____________ 

that can be obtained from the system during any change .

a Maximum work

b. Useful work 

c Net work

d. Minimum work.

Transport number of ion deacreases with________

a. increase in the size of the ion 

b. Decrease n the size of the ion 

c. increase in temperature

Transport number does not depends on 

A gas has a volume of 2.8 L at a temperature of 27°C. What temperature (°C) is needed to expand the volume to 15 L?