A0.50 molar aqueous solution of hydrochloric acid (hcl) flows into a process unit at 25°c and a rate of 1.25 m3/min. if the specific gravity of the hcl solution is 1.03 at 25°c determine: a) hcl concentration in kg/m3 b) mass flow rate in kg hcl/s c) massfractioninkghcl/kgsolution d) mole ratio in mol hcl/mol water e) molar flow rate in kmol hcl/s

a) 18,23 kgHCl/m³

b) 0,38 kg HCl/s

c) 0,018 kgHCl/kgsolution

d) 8,75x10⁻³ molHCl/molH₂O

e) 0,010 kmolHCl/s

Explanation:

The HCl solution is 0,50 mol/L; it flows in a rate of 1,25 m³/min; Its density is 1,03 kg/L. HCl weights 36,46 g/mol

a) The HCl concentration in kg/m³ is:

×××= 18,23 kg HCl/m³

b) As you have a concentration of 18,23 kgHCl/m³

×× = 0,38 kg HCl/s

c) The mass fraction in kgHCl/kgsolution is:

×× = 0,018 kgHCl/kgsolution

d) Supposing L of solution are just of water:

×××= 8,75x10⁻³ molHCl/molH₂O

e) As the flow is 0,38kg HCl/s:

×= 0,010 kmolHCl/s

I hope it helps!

the enthalpy of formation of water is given as -285.8kj/mol, which states that the enthalpy of formation is negative.

negative enthalpy of formation indicates that the heat is released during the reaction process. the heat is released from reaction to the surroundings the enthalpy is expressed with a negative sign with the energy given out in the reaction process.

the formation of water takes place by giving out heat which is -285.8 kj/mol.