Other Chemistry Answers

Use Henry’s Law for gas-liquid solutions to determine the solubility of acetylene gas (C2H2) at 12.5 atm of pressure and 20ºC. Henry’s Law Constant for acetylene gas in water is 1.04 moles/L.atm at 20ºC. 

The fresh feed to ammonia synthesis reactor contains nitrogen, hydrogen and 2.0 mole 

% inerts. The mole ratio of H2:N2 is 3:1. The product stream consists of pure 

ammonia. The conversion in the reactor is 15 %, a recycle stream is used and in order 

to avoid build-up of inerts, a purge is withdrawn. The rate of purge stream is adjusted 

to keep inert concentration in the recycle stream at 8 mole per cent. Calculate the 

moles of ammonia produced.

Calculate the entropy change, So for the following process.

a. Melting of ice at 0°C (heat of fusion of ice is 6.02 kJ/mol)

b. Freezing of 20.0 g liquid metal mercury at -38.9°C. (molar enthalpy of fusion of mercury is 2.33 kJ/mol)

Calculate the entropy change,  S° for the following reactions using tabulated standard entropy values and figure out if the resulting values obtained are consistent with the expected entropy change as predicted qualitatively.

Thermal decomposition of NaNO3

2 NaNO3(S)  ( 2 NaNO2(s) +  O2(g)

So values at 25°C:

NaNO3(S) = 116.5 J/mol-K

NaNO2(s) = 103.8 J/mol-K

O2(g)       = 205 J/mol-K