Answer Happy

Insulation Th Tc Ag 1 Insulation T₁ Part 1) Two metal rods of the same cross-sectional area and length are brought into contact with each other. They are surrounded by an insulating material. One of the metal rods is silver (conductivity = 429 W/m²), and the other metal is unknown. One end of the unknown metal is at T, = 0.0°C, while the other end of the silver is at T = 80.0'C. The system reaches a steady state, with the temperature at the junction of the two metals measured to be 7) = 47.2°C. What is the conductivity of the unknown metal? W/m² k= Part 2) A billionaire decides to throw money at reversing climate change by removing CO₂ directly from the atmosphere and storing it. They build a plant that is able to cool a rigid 100 m x 100 m x 100 m volume to a temperature such that the CO, turns into a solid, but O, and N₂ remain a gas. At atmospheric pressures, CO₂ turns from a gas into a solid at -78.5°C. Assume that the air in question is dry and contains 0.04% CO₂, 21% O₂, and the remainder of the air is N₂. Calculate the number of moles of gas in the volume. mols 11= Unknown
Part 2) A billionaire decides to throw money at reversing climate change by removing CO₂ directly from the atmosphere and storing it. They build a plant that is able to cool a rigid 100 mx 100 mx 100 m volume to a temperature such that the CO₂ turns into a solid, but O₂ and N₂ remain a gas. At atmospheric pressures, CO, turns from a gas into a solid at -78.5°C. Assume that the air in question is dry and contains 0.04% CO₂, 21% O₂, and the remainder of the air is N₂. Calculate the number of moles of gas in the volume. n= mols Calculate the heat required to cool the gas in the volume to -78.5°C, starting from atmospheric pressure and a temperature of 24.6°C. Assume for this that the volume is pure O₂ and N₂ (i.e., 21% O₂ and 79% N₂). Q= J removed from the gas. Part 3) If we approximate the molar amount of CO₂ present in the volume as being 0.04% of the molar amount of pure Ny and O, calculated above, and, given the molar mass of CO₂ is 44.010 g/mol, calculate the energy required to convert all the CO₂ from gas at -78.5°C directly into solid form, where the "latent heat of sublimation" associated with this phase change is 1.99 x 10 J/kg. Q= A correct answer is 298, which can be typed in as follows: 290 A correct answer is 40800000, which can be typed in as follows: 40800000 A correct answer is 87400000000, which can be typed in as follows: 87400000000 A correct answer is 143000000, which can be typed in as follows: 143000000