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• As T& C.p's speed change, IeFs stay "on" in ~ the same % level, then step ↑ or Į to a different level, in physical state changes! = Massively and very effectively store heat/cold: in the chemical energy of IeFs at constant T! (g) 00 toc at P = 1 atm H20(s) Heating Curve %3D 125 3% IeFs "on" H,0(1) → H,0(g) Gas Liquid - ↑ higher Edh 100 AHvap= 40.7 kJ/mol %3D 75 exo thermic state changes 50- (1) ~ 80% IeFs "on" 25- endo thermic state changes Solid ~100% IeFs 'on' -25 10 20 30 40 50 60 q: heat added, kJ/mol Į lower Ech ... Which 1 g will take longer to, when left at 25 °C: H,0(I, 0 °C) H2O(1, 100 °C) H,0(s, 0 °C) H20(g, 100 °C) or warm: or heat cool: (s) - H20(s) → H,0(I) * } AHfus(H20, 0 °C) = +6.01 kJ/mol heat of fusion (melt ing) 1 mol[H,0(s)-→(1)] → +6.01 kJ →1 mol[(s)→H,0(I)] AH > 0 + heat flows in Hendothermic → Ech I 1 mol[H20(1)-→(s)] -6.01 kJe1 mol[(1)→H,0(s)] Find kJ of heat in melting of 7.5 g H,0(s):

• As T& C.p's speed change, IeFs stay "on" in ~ the same % level, then step ↑ or Į to a different level, in physical state changes! = Massively and very effectively store heat/cold: in the chemical energy of IeFs at constant T! (g) 00 toc at P = 1 atm H20(s) Heating Curve %3D 125 3% IeFs "on" H,0(1) → H,0(g) Gas Liquid - ↑ higher Edh 100 AHvap= 40.7 kJ/mol %3D 75 exo thermic state changes 50- (1) ~ 80% IeFs "on" 25- endo thermic state changes Solid ~100% IeFs 'on' -25 10 20 30 40 50 60 q: heat added, kJ/mol Į lower Ech ... Which 1 g will take longer to, when left at 25 °C: H,0(I, 0 °C) H2O(1, 100 °C) H,0(s, 0 °C) H20(g, 100 °C) or warm: or heat cool: (s) - H20(s) → H,0(I) * } AHfus(H20, 0 °C) = +6.01 kJ/mol heat of fusion (melt ing) 1 mol[H,0(s)-→(1)] → +6.01 kJ →1 mol[(s)→H,0(I)] AH > 0 + heat flows in Hendothermic → Ech I 1 mol[H20(1)-→(s)] -6.01 kJe1 mol[(1)→H,0(s)] Find kJ of heat in melting of 7.5 g H,0(s):

Chemistry
Chemistry
10th Edition
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter1: Chemical Foundations
Section: Chapter Questions
Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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• As T& c.p's speed change, IeFs stay "on" in the same % level, then step t or to a different level, in physical state changes! = Massively and very effectively store heat/cold: in the chemical energy of IeFs at constant T! (g) toc at P = 1 atm H20(s) Heating Curve %3D ~ 3% IeFs "on" 125 H,O(1) → H,0(g) Gas Liquid ↑ higher Ech 100 - AHvap= 40.7 kJ/mol %3D 75 exo thermic state changes 50 (1) ~ 80% IeFs "on" 25 endo thermic state changes Solid -25- ~100% IeFs 'on' 10 20 30 40 50 60 I lower Eh q: heat added, kJ/mol Which 1 g will take longer to, when left at 25 °C: H20(I, 0 °C) H2O(1, 100 °C) ... H,0(s, 0 °C) H20(g, 100 °C) or warm: or heat cool: (s) * } AHfus(H2O, 0 °C) = +6.01 kJ/mol heat of fusion (melt ing) 1 mol[H,0(s)→(1)] +6.01 kJ e1 mol[(s)→H2O(1)] H20(s) → H,0(1) %3D AH > 0 heat flows in dendothermic Ech 1 1 mol[H20(1)-(s)] → -6.01 kJe1 mol[(1)→H20(s)] Find kJ of heat in melting of 7.5 g H,0(s):
Transcribed Image Text:• As T& c.p's speed change, IeFs stay "on" in the same % level, then step t or to a different level, in physical state changes! = Massively and very effectively store heat/cold: in the chemical energy of IeFs at constant T! (g) toc at P = 1 atm H20(s) Heating Curve %3D ~ 3% IeFs "on" 125 H,O(1) → H,0(g) Gas Liquid ↑ higher Ech 100 - AHvap= 40.7 kJ/mol %3D 75 exo thermic state changes 50 (1) ~ 80% IeFs "on" 25 endo thermic state changes Solid -25- ~100% IeFs 'on' 10 20 30 40 50 60 I lower Eh q: heat added, kJ/mol Which 1 g will take longer to, when left at 25 °C: H20(I, 0 °C) H2O(1, 100 °C) ... H,0(s, 0 °C) H20(g, 100 °C) or warm: or heat cool: (s) * } AHfus(H2O, 0 °C) = +6.01 kJ/mol heat of fusion (melt ing) 1 mol[H,0(s)→(1)] +6.01 kJ e1 mol[(s)→H2O(1)] H20(s) → H,0(1) %3D AH > 0 heat flows in dendothermic Ech 1 1 mol[H20(1)-(s)] → -6.01 kJe1 mol[(1)→H20(s)] Find kJ of heat in melting of 7.5 g H,0(s):
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