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- Ozone is formed in the atmosphere by thecombination of oxygen molecules withA. chlorofluorocarbons.B. hydrocarbons.C. oxygen atoms.D. CO2.E. ClO.Calculate the quantity of heat in kJ, associated with a 33.5oC decrease in temperature in a 5.85 kg aluminum bar (specific heat of aluminum=0.903 J g-1 oC-1)Discuss the need for a high-Tc superconductor.
- Which of the following is NOT a valid classification of boilers? a) Forced circulation and natural circulation b) High pressure and low pressure c) Stationary and Portable d) Single fired and Double firedCalculate the quantity of heat in kJ, associated with a 33.5oC decrease in temperature in: 1. A 5.85 kg aluminum bar (specific heat of aluminum=0.903J g-1 oC-1)The standard free energy of formation of cubic silicon carbide (SiC) is 62.8 kJ mol-1 . Determine the standard free energy change when 1.00 mol SiC reacts with oxygen to form SiO2 (s, quartz) and CO2(g). Is silicon carbide thermodynamically stable in the air at room conditions?
