or false. What does the statement mean? For a bigger
piece of some substance, the relationship between mass
and volume is different than it is for a smaller piece of
that same substance. That’s false. For any substance,
the relationship between mass and volume is given by
the density of the substance. For solids and liquids,
density does not change with sample size.
- F, T Again, divide and conquer. Look at the first statement. Is it true? For
solids and liquids, volume can increase somewhat by heating the
substance, even while the mass remains constant. The volume of a
constant amount of gas can also be increased by heating or cooling the
gas, or by simply placing the gas in a larger container. Therefore, the
statement is false.
Look at the second statement. Does density represent
mass per volume? Yes, it does. The second statement is
true. Since one of the statements is false, you leave the
CE oval blank.
- F, F Divide and conquer. Since we do not know the temperature of X or
Y, we cannot say which 10-g sample has more heat content, so
statement I is false.
Consider statement II. A substance with a relatively low
specific heat will undergo a relatively large temperature
change upon the addition of heat, so statement II is
false. Don’t fill in the CE oval.
- E Don’t even look at the answer options until you really understand
the situation that’s being described. You’ve got two objects. They occupy
the same volume, but one has half the density of the other. Since
density =
you know that this means that the object with less
density has one-half the mass of the object with greater
density.
