Answer:
D
Explanation:
If you add two or more thermochemical equations to give a final equation, then you also add the heats of reaction to give the final heat of reaction
Answer: The vapor pressure of the solution is 186.4 torr
Explanation:
As the relative lowering of vapor pressure is directly proportional to the amount of dissolved solute.
The formula for relative lowering of vapor pressure will be,
where,
= relative lowering in vapor pressure
i = Van'T Hoff factor = 1 (for non electrolytes)
= mole fraction of solute =
Given : 21.5 g of lactose is present in 200.0 g of water.
moles of solute (lactose) =
moles of solvent (water) =
Total moles = moles of solute (lactose) + moles of solvent (water) = 0.0628+ 11.1 = 11.1628
= mole fraction of solute =
Thus the vapor pressure of the solution is 186.4 torr
Answer:
n-Pentane
Explanation:
All molecules possess dispersion forces. It is possible in non-polar molecules that a temporary distortion in the electron distribution of one molecule can affect the electron distribution in a neighboring molecule. This is known as induced dipole, induced dipole forces.
However, this induced dipole, induced dipole forces depends on the shape of the molecule. Molecules of n-pentane are capable of better interaction via induced dipole, induced dipole forces since the molecules interact over the entire length of the molecule rather than neopentane which is more compact and nearly spherical.
Answer:
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