Final answer:
Oxy-acetylene combustion reaches an extreme temperature of up to 6000 °F, and four oxygen tanks would be required to completely burn 9340 liters of acetylene.
Step-by-step explanation:
Oxy-acetylene generates the extreme temperature which can reach up to 6,000 °F. Therefore, the correct answer is d) Extreme; 6000.
An oxy-acetylene torch produces heat through the combustion of acetylene in oxygen, a reaction that is highly exothermic. According to Hess's Law and examples provided, acetylene (C₂H₂) burns at an extremely high temperature, which is used effectively in welding and cutting metals due to the very high temperatures obtained. Specifically, when mixed 1:1 with oxygen, a temperature of over 3000°C can be achieved, which translates to over 5400°F, far exceeding the temperatures listed in the other options provided.
Based on the balanced chemical equation for the combustion of acetylene, 2 C₂H₂ + 5 O₂ → 4 CO₂ + 2 H₂O, one can deduce that one mole of acetylene requires two and a half moles of oxygen to combust completely. Consequently, to burn 9340 liters of acetylene gas at 0°C and 1 atm, we would need 2.5 times that volume in oxygen gas, which would be 23350 liters of oxygen. Since each oxygen tank contains 7000 liters of O₂, the number of tanks needed would be ⌵0/7000, which equals approximately 3.33; therefore, four tanks of oxygen would be required to ensure complete combustion of the acetylene.