Consider the phase diagram on the right to answer this question. At -15 degree c

Question

Consider the phase diagram on the right to answer this question. At -15 degree c, which phase is the most dense and which is the least dense? Use table A provided m this exam to answer this question. Which of the substances listed in Table A requires the largest amount of energy to raise the temperature of 30.0 g of the substance from 18.0 degree C to 38.0 degree C? H_2O H_2O(I) Al(s) Hg(l) Fe(s) The graph on the right represents the heating curve for a substance that starts as a solid below its freezing point. What is the melting point for this substance? 30 degree C 55 degreee C 90 degree c 120 degree C The graph does not provide this information

Explanation / Answer

6) in that point exist only to phases gas and solid.

Moving about the phase diagram reveals information about the phases of matter. Moving along a constant temperature line reveals relative densities of the phases. When moving from the bottom of the diagram to the top, the relative density increases. Moving along a constant pressure line reveals relative energies of the phases. When moving from the left of the diagram to the right, the relative energies increases.

then the answer is A) Most dense solid and least dense gas.

7) To answer this question i would need to look at the table, but a can give you a hint.

The substance wich would require the largest amount of energy will be that who has the higher specific heat. Because this heat can tell us the amount of energy needed to raise in 1 grade, 1 gram of the substance.

8)

Thus the answer is B) 55 °C

Related Questions

Navigate

• Browse (All)
• Browse C
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.