Passage II
A teacher provided the table below to the students in a science class. The table gives 5 properties for each of Samples A-H. The students were told to assume that each sample is a completely solid cube composed of a single hypothetical pure substance.
The teacher asked each of 4 students to explain how these data could be used to predict which samples are composed of the same substance.
Student 1
If 2 samples have the same values for all 5 properties, they are composed of the same substance. If 2 samples have different values for any of the 5 properties, they are composed of different substances.
Student 2
If 2 samples have the same values for any 3 or more of the 5 properties, they are composed of the same substance. If 2 samples have the same values for fewer than 3 of the properties, they are composed of different substances.
Student 3
If 2 samples have the same mass, volume, and density, they are composed of the same substance. If 2 samples have different values for any of these 3 properties, they are composed of different substances. Neither melting point nor boiling paint, by itself, can distinguish between substances.
Student 4
If 2 samples have the same density, melting point, and boiling point, they are composed of the same substance. If 2 samples have different values for any of these 3 properties, they are composed of different substances. Neither mass nor volume, by itself, can distinguish between substances.
9. Suppose that the temperature of Sample A is increased to 250°C at 1 atm of pressure. At 250°C, would Sample A be a solid or a liquid?
Your Answer is
Correct Answer is C
Explanation
It can be seen from the table that the melting point of Sample A is 126°C, and the boiling point is 747°C. The temperature given in the title is 250°C, which exceeds the melting point and does not reach the boiling point, so it is liquid at this temperature