Answer: Option (c) is the correct answer.
Explanation:
In liquids, molecules are held by slightly less strong intermolecular forces of attraction as compared to solids.
Hence, molecules of a liquid are able to slide past each other as they have more kinetic energy than the molecules of a solid.
As a result, liquids are able to occupy the shape of container in which they are placed. Also, liquids have fixed volume but no fixed shape.
Thus, we can conclude that liquids have a variable shape and a fixed volume.
Answer:
447.58 J
Explanation:
The change in internal energy is the difference between the heat absorbed and the work done due to gas expansion. The following variables are given in the problem:
Change in volume = ΔV = 2.0 L
External pressure = P = 0.93 atm
Work done due to gas expansion = W = P*ΔV = 2*0.93 = 1.86 L-atm
We can convert the work done from L-atm to J by using the conversion unit given in the question: 1 L-atm = 101.3 J. Thus:
Work done = 1.86*101.3 = 188.418 J
Change in Internal energy (ΔU) = heat absorbed (Q) - work done (W)
The heat absorbed is equivalent to 636 J. thus, the internal energy is:
ΔU = 636 - 188.418 = 447.58 J
Because their atoms have the same number of electrons in the highest occupied energy level
Answer:
750g of Aluminum
Assuming 8.6 cm lenth is the height of the cylinder. The volume of a cylinder is: V =
*r^2*h
V = 3.14cm x 10.24cm x 3.6cm
V = 280cm^3
Now density = mass/volume
2.7g/cm^3 = mass/280cm^3
2.7g/cm^3 x 280cm^3 = mass/<u>280cm^3</u> x <u>280cm^3</u>
= 750g of Aluminum
Mass over volume
200 over100
2