On a separate sheet of paper, define or describe the following terms: (1 points

Question

On a separate sheet of paper, define or describe the following terms: (1 points eadh) a. endo- vs exothermic reactions b. d. enthalpy of formation enthalpy e. enthalpy of reaction heat capacity 2. What is the enthalpy of formation, AH? . for the following: Norte: the AH; data can be found in Table6.4 (page 254) or Appendix 3 (p A-8 through 12).(1 point each) a. Fe (s) b. Fe,O, (s) c. H20 (g) d. H,0 () e. CO (g) Problems 3 -6 are to be done on a separate sheet of paper. Each problem is worth 5 poi 3. H, data in Table 6.4 (page 254) or Appendix 3 (p A-8 through A-12) to calcula Use the the enthalpy of reaction AHp for the following reactions. Label each as either endo- or exothermic. 2 H,O (9) 2 H2 (g)+0, (g) b. CH2 (g)+3 0, (g) 2 CO, (9) 2H,0 (9) a. c CoH12s(s)+6 02(9)-6 CO, (9)+ 6 H,O A 41.8 g cube of Cu was heated to 100°C and placed in 150 mL of H,O at 25°C. W be the final temperature of the water? The specific heat of Cu is 0.38 J/g and wat 4.18 J/g 4. 113.4 g of iron at 100°C are put into 125 g of water at 22°C. When the system c thermal equilibrium, the temperature is 30.5°C. What is the heat capacity of iron specific heat of water is 4.18 Jg) in J/go, and in J/ mol °

Explanation / Answer

1.

a. endothermic reactions are those in which energy is absorbed

exothermic reactions are those in which energy is released.

b.

enthalpy is the heat content at constant pressure

c.

enthalpy of formation: the amount of energy released when 1 mole of the substance is formed from its constituent elements.

d. enthalpy of reaction is the neergy released or absorbed when a chemical reaction occurs.

e. heat capacity is the amount of heat required to raise the temperature of the substance of 1 gram by 10c.

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