45. Refer to the following heating curve (temperature vs. heat input) for a part

Question

45. Refer to the following heating curve (temperature vs. heat input) for a particul f oints) the curve: (8 points) where the arrows relate specific temperatures to specific points on 100°C 80- .. 50C -20°C A B 500 800 10 100 Calories a. What is the numeric value of the melting point of the boiling point and what letters represent the melting , and what letters represent the boiling , a pure liqu process from beginning to end? b. What is the numeric value process from beginning to end? c. Enter a num enc temperature value where the substance is a pure solid and a pure gas d. What is the numeric value of the heat of fusion? e. What is the numeric value of the heat of vaporization? NUS QUESTION:

Explanation / Answer

a.

melting point is given between A and B --> -20°C

melting process as stted, is between A and B, it is getting energy to break all interactions

b.

boiling point must be between C and , T = 80°C

the leetters C-D have an energy change as T wont chage, this is energy used to form gas

c.

pure solid --> between -20°C and -40|C, choose -40°C

pure iquid --< between -20|C and 80°C, choose 50°C

pure gas --> between 80°C and infinity, choose 100°C

d

heat of fussion --> energy difference between liquid and solid enthalpies --> (B-A) = 100-10 = 90 calories

e

heat of vapor --> energy difference between liquid and vapor enthalpies --> (D-C) = 800-500= 300 calories

Related Questions

Navigate

• Browse (All)
• Browse 4
• Subjects

---

---

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