SOLVED

10.2 Algorithmic Questions 1) For a process at constant pressure, 49,600 calories of heat are released. This quantity of heat is equivalent to A) 4.82 × 10-6 J. B) 1.19 × 104 J. C) 1.24 × 104 J. D) 2.08 × 105 J. 2) Which of the following is true if ΔEsys = – 115 J? A) The system is gaining 115 J, while the surroundings are losing 115 J. B) The system is losing 115 J, while the surroundings are gaining 115 J. C) Both the system and the surroundings are gaining 115 J. D) Both the system and the surroundings are losing 115 J. E) None of the above are true. 3) Calculate the change internal energy (ΔE) for a system that is giving off 65.0 kJ of heat and is performing 855 J of work on the surroundings. A) 64.1 kJ B) -64.1 kJ C) -65.9 kJ D) 9.00 × 102 kJ E) -9.00 × 102 kJ 4) Calculate the kinetic energy of a 150 g baseball moving at a speed of 39. m/s (87 mph). A) 5.8 J B) 1.1 × 102 J C) 5.8 × 103 J D) 1.1 × 105 J 5) Define heat capacity. A) the quantity of heat required to lower the temperature of 1 mole of a substance by 1°C B) the quantity of heat required to change a system’s temperature by 1°C C) the quantity of heat required to lower the temperature of 1 gram of a substance by 1°C D) the quantity of heat required to raise the temperature of 1 g of a substance by 1°F E) the quantity of heat required to lower the temperature of 1 liter of a substance by 1°C 6) Define specific heat capacity. A) the quantity of heat required to lower the temperature of 1 mole of a substance by 1°C B) the quantity of heat required to change a system’s temperature by 1°C C) the quantity of heat required to raise the temperature of 1 gram of a substance by 1°C D) the quantity of heat required to lower the temperature of 1 gram of a substance by 1°F E) the quantity of heat required to lower the temperature of 1 liter of a substance by 1°C 7) Define molar heat capacity. A) the quantity of heat required to raise the temperature of 1 mole of a substance by 1°C B) the quantity of heat required to change a system’s temperature by 1°C C) the quantity of heat required to raise the temperature of 1 gram of a substance by 1°C D) the quantity of heat required to lower the temperature of 1 g of a substance by 1°F E) the quantity of heat required to lower the temperature of 1 liter of a substance by 1°C 8) Give the units of heat capacity. A) J/°C B) J/g °C C) Jmole/°C D) g/°C E) mole/°C 9) Give the units of specific heat capacity. A) J/°C B) J/g °C C) Jmole °C D) g/°C E) gmole °C 10) Calculate the work, w, gained or lost by the system when a gas expands from 15 L to 40 L against a constant external pressure of 1.5 atm. 1 L ? atm = 101 J A) -6.1 kJ B) -3.8 kJ C) +3.8 kJ D) +6.1 kJ