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Unit 7 Review Game Board

Unit 7 Review Game Board. 1. What is the heat of fusion in kJ/g of a substance if it takes 65980 J of heat to melt a 55 g sample of the substance?. 1.2 kJ/g. Back. 2. A reaction occurs spontaneously when  G is:. negative. Back. 3. 605 K equals how many degrees Celsius?. 332 C.

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Unit 7 Review Game Board

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  1. Unit 7 Review Game Board

  2. 1 What is the heat of fusion in kJ/g of a substance if it takes 65980 J of heat to melt a 55 g sample of the substance? 1.2 kJ/g Back

  3. 2 A reaction occurs spontaneously when G is: negative Back

  4. 3 605 K equals how many degrees Celsius? 332 C Back

  5. 4 A measure of the average kinetic energy of the particles in a sample of matter? Temperature Back

  6. 5 What letter corresponds to the melting of a solid? b Back

  7. 6 In the equation, q = nCT, what does q stand for? heat Back

  8. 7 What is a measure of the disorder in a system? entropy Back

  9. 8 What is the formula that defines the change in Gibbs energy? G = H – TS Back

  10. 9 The study of all energy changes is called Thermodynamics Back

  11. 10 In the equation, q=nCT, what does C stand for? Molar heat capacity Back

  12. 11 According to ____________________, the overall enthalpy change in a reaction is equal to the sum of the enthalpy changes of individual steps. Hess’s Law Back

  13. 12 A positive S means the process was ____________. More disorderly Back

  14. 13 Entropy plays a larger role in determining the Gibbs energy of reactions that take place at _____________ temperatures. Higher Back

  15. 14 This is the energy of a system at constant pressure. Enthalpy Back

  16. 15 In the Gibb’s energy equation, ___________ is the symbol for entropy. S Back

  17. 16 The standard enthalpy of formation of a(n) ____________ is equal to zero. element Back

  18. 17 In the expression q = nCT, what does n represent? moles Back

  19. 18 A negative G means the process was ____________. spontaneous Back

  20. 19 The term ____________________ refers to the amount of energy as heat required to raise the temperature of 1 mole of a substance by 1 K. Molar heat capacity Back

  21. 20 A negative H means the process was ____________. exothermic Back

  22. 21 A device used to measure the heat absorbed or released in a chemical or physical change calorimeter Back

  23. 22 This equation is used to calculate heat. q=nCT Back

  24. 23 What letter represents the range where the liquid is being warmed? c Back

  25. 24 In the Gibb’s energy equation, __________ is the symbol for enthalpy. H Back

  26. 25 What is 52 Joules in calories? 12.4 calories Back

  27. 26 A 58.2 g sample was heated from 300 K to 350 K. It absorbed 1523 J of energy. What is the specific heat of iron? 0.53 J/gK Back

  28. 27 The total entropy of the products in a reaction is 732 J/K, and the total entropy of the reactants is 524 J/K. What is S for the reaction? 208 J/K Back

  29. 28 452 ºF to ºC 233 C Back

  30. 29 How much energy as heat does an iron (MM = 55.8 g/mol) sample gain if its molar heat capacity is 25.1 J/K mol, its mass is 33.01 g, and it is heated from 15.0°C to 42.0°C? 400.9 J Back

  31. 30 If 1484 J of energy as heat is released from a 800 g block of aluminum (MM = 27.0). What temperature change occurred if the molar heat capacity of aluminum is 24.2 J/K.mol? 2.07 K Back

  32. 31 What is the boiling point of the substance (number)? 450 K Back

  33. 32 A 426.3 g sample of Gold (MW = 197) was heated from 0°C to 20°C. It absorbed 1108 J of energy. What is the molar heat capacity of iron? 25.6 J/mol.°C Back

  34. 33 341 K equals how many degrees Fahrenheit? 154 C Back

  35. 34 What is the value of G at 330 K for a reaction in which H = –103 kJ/mol and S = +23.00 J/mol K? -110590 J/mol Or -110.59 kJ/mol Back

  36. 35 For a process in which H is –98 kJ and S is 132 J/K, calculate the change in the free energy at 0°C. -134036 J/mol Or -134 kJ/mol Back

  37. 36 When calculating the change in enthalpy of a reaction, this is the equation that is used. H reaction = H products - H reactants Back

  38. 37 Water has a specific heat of 4.18 J/gK. What is its molar heat capacity? 75.24 J/molK Back

  39. 38 How much heat would be needed to evaporate 100 g of water if the heat of vaporization of water is 2.26 kJ/g? 226 kJ Back

  40. 39 How much energy as heat does a 9 mol titanium sample gain if its molar heat capacity is 27.8 J/K mol and it is heated from 15°C to 55.0°C? 10008 J Back

  41. 40 What is the standard thermodynamic temperature? 25 C (or 298 K) Back

  42. 41 The English measurement for measuring energy is the ___________ calorie Back

  43. 42 What is the melting point of this substance? 300 K A B Back

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