Why is the viscosity of water greater than that of liquid H_2 S, and; (b) Water

Question

Why is the viscosity of water greater than that of liquid H_2 S, and; (b) Water in a glass tube will take on a downward curve surface. Why? (a) Sketch a properly labelled heating curve for water in a closed vessel starting at -20 degree C and ending at 120 degree C, and; (b) Calculate the amount of heat that is required to melt completely 25.0 g office at 100 degree C. Delta H+_fus for water is 6.01 kJ/mol. (a) What is sublimation and what can it be used for, and; (b) What is AH8ub for iodine given that Delta H_fus is 6.01 kJ/mol. is 6.01 kJ/mol and Delta H_vap is 6-01 kJ/mol. Tungsten metal (W) has body-centered cubic unit cell with an edge length of 317 pm. What is the density of the metal in g/cm. The unit cell of a compound of titanium, calcium and oxygen is shown below: Use the diagram to determine the formula of the compound and coordination number of the Ti, and show that the oxidation state (number) of the Ti is 4+? (a) State Henry's Law.

Explanation / Answer

(1) Viscosity of water is greater than that of H2S.

Reason:

In water since H is attached to more electronegative O atom, water forms intermolcular hydrogen bond among its molecules. Hence all water molecules are closely associated which results higher viscosity.

But in H2S, H is attached to less electronegative S atom, due to which Hydrogen bonds cannot be formed among H2S molecules. Hence it has less viscosity.

(b) The molecues at the surface cannot have equal forces aroud themselve compared to the molecules in the bulk. Hence the surface molecules are more effectively attracted by the molecules present in the bulk, so it causes pulling of surface molecules back side which results down ward curve surface.

Related Questions

Navigate

• Browse (All)
• Browse W
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.