Consider a u-tube whose arms are open to the atmosphere. now water is poured into the u-tube from one arm, and light oil = 790 kg/m3) from the other. one arm contains 70-cm-high water, while the other arm contains both fluids with an oil-to-water height ratio of 6. determine the height of each fluid in that arm.

Oil high= 73.14cm

Water high= 12.19cm

Explanation:

See the attached images.

The first important concept is that in an open tube at both ends the atmospheric pressure balances itself.

The pressure on both sides of the tube is the same in the equilibrium. The pressure of each fluid depends on its height and density.

vanderwaal's forces of attraction are the electrostatic intermolecular forces that exist in a molecule due to the temporary or permanent dipoles that are developed in a molecule. in , the major intermolecular forces are dipole-dipole interactions as the molecule is polar (bent structure). so the vanderwaal's forces of interaction in between molecules are the permanent dipole-dipole interactions that develop due to the dipole that exists in between the polar h - s bond. the positively charged hydrogen atom is attracted towards the negative end of the dipole that is sulfur of the adjacent molecule. therefore, these forces of attraction are relatively stronger than that of london dispersion forces that exist in non polar molecules.

answer: enthalpy

explanation:

for a exothermic reaction, the energy is released i.e. the energy of the products is lower than the energy of the reactants.

= enthaply

= energy of products

= energy of reactants

as , thus comes out to be negative. negative value of enthalpy shows that the reaction is exothermic.