Physical Chemistry Answers

A silica crucible have the weight of 7.0 g after evaporating 20 mL of waste water sample at 100 degree Celsius. The empty silica crucible weight is 5.0g. Calculate and upload here the amount of total dissolved solids in the given waste water sample?

A silica crucible have the weight of 7.0 g after evaporating 20 mL of waste water sample at 100 degree Celsius. The empty silica crucible weight is 5.0g. Calculate and upload here the amount of total dissolved solids in the given waste water sample?

5. Which one of the following has the greatest entropy?

a. H2O(s)

b. H2O(l)

c. H2O(g)¬

d. All have the same entropy.

write half cell and net cell reactions for the given cells

Ag/ AgCl, KCl/ Cl2, Pt

How is osmolarity and osmolality related to tonicity of a substance

n moles of N2 gas (T1, V1) obey a van der Waals equation of state are contained in an insulated piston-cylinder arrangement. A reversible expansion of the gas is carried out until the volume become 2V1.

[CV.m = 28.80 J mol−1K−1, a = 1.37 L2.bar.mol-2, b = 0.0387 L. mol−1]

(a) Find the final temperature of gas as a function of n, 𝐂𝐂𝐕𝐕.𝐦𝐦 , T1, V1 and the van der Waals parameter a and b.

(b) If two moles of N2 gas involved and T1 = 350K, V1 = 40L, compute final temperature of the gas.

(c) Find work done and internal energy of the gas.

The reaction mechanism for the decomposition of A2 A2 ⇄ A + A (fast) A + B → P (slow) involves an intermediate A. Deduce the rate law for the reaction using steady-state approximation

If we burn 4.00 g of methylhydrazine in a bomb calorimeter, the temperature of the calorimeter increases from 25.00ºC to 39.50 ° C. In a separate experiment, the heat capacity of the calorimeter was determined to be 7,794 kJ / ºC. Calculate the heat of reaction for combustion of one mole of CH6N2 in this calorimeter.

A current of 2 ampere passing for 5hrs through a molten antimony salt deposits of 0.02002lbs. What

is the oxidation state of the salt?

The change in temperature of water upon entering and leaving a diffuser is 15oC. A 1kg of water

leaves water the diffuser at 600 𝒎

𝒔

. The outlet diameter is 300cm. Assume no work and heat transfer.

Use Cp=1

𝑲𝑱

𝑲𝒈.𝑲

. Calculate the following:

a. Inlet velocity

b. Inlet diameter