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15) Which is not a solution? A) sterling silver B) dry ice - CO2 solid C)...
Sterling silver is a solid solution of silver and copper. If a piece of a sterling silver necklace has a mass of 160.0 g and a volume of 15.42 mL, calculate the mass percent of copper in the piece of necklace. Assume that the volume of silver present plus the volume of copper present equals the total volume. (Density of Cu = 8.96 g/cm^3: density of Ag = 10.5 g/cm.) mass percent of copper = mass of copper/total mass times...
A 41.1 g sample of solid CO2 (dry ice) is added to a container at a temperature of 100 K with a volume of 3.4 L. A. If the container is evacuated (all of the gas removed), sealed, and then allowed to warm to room temperature T = 298 K so that all of the solid CO2 is converted to a gas, what is the pressure inside the container?
17.34. Another decorative "ice" sculpture is carved from dry ice (solid CO2) and held at its sublimation point of -78.5 C. What is the entropy change to the universe when the COp sculpture, weighing 389 g, sublimes on a granite tabletop if the temperature of the granite is 12'C and the process occurs reversibly? Assume a final temperature for the CO vapor of -78.5 C. The heat of sublimation of CO2 is 26.1 kJ/mol.
The conversion of solid CO2 ("dry ice") to CO2 gas is product-favored at room temperature. What would be the signs for ΔG, ΔH, and ΔS at room temperature? CO2(s) --> CO2(g) ΔG = (+) ΔH = (+) ΔS = (-) ΔG = (-) ΔH = (+) ΔS = (-) ΔG = (+) ΔH = (+) ΔS = (+) ΔG = (-) ΔH = (+) ΔS = (+) ΔG = (-) ΔH = (-) ΔS = (+)
13) (1.5 pts) You fill an uninflated balloon with 18 grams of solid CO2 (dry ice, M= 44.0 g/mol). What volume will the dry ice occupy when it vaporizes at 25°C and 1.02 atm? The balloon has capacity of 6.5 liters, will it pop?
30 g of dry ice (solid CO2) is placed in a 2.0×104 cm3 container, then all the air is quickly pumped out and the container sealed. The container is warmed to 0∘C, a temperature at which CO2 is a gas. a.) What is the gas pressure? Give your answer in atm. The gas then undergoes an isothermal compression until the pressure is 2.4 atm , immediately followed by an isobaric compression until the volume is 2000 cm3 . b.) What...
Dry ice, CO2(s), is thermodynamically stable at temperatures below -78 °C. The sublimation of dry ice can be described by the following equation: CO2(s) = CO2(g) What are the signs for the enthalpy, entropy, and free energy change for the sublimation at room temperature? Justify your answer for each thermodynamic value.
Calculate the amount of heat required to completely sublime 58.0 g of solid dry ice (CO2) at its sublimation temperature. The heat of sublimation for carbon dioxide is 32.3 kJmol−1.
What is the entropy change in J/K to the universe when a dry ice (CO2) sculpture weighing 386.1 g sublimates on a table top at 21.7 °C and the process occurs reversibly? The temperatures of the dry ice solid and vapour are both -78.5 °C, and the heat of sublimation of dry ice is 21.6 kJ/mol. (2 marks) (Give answer to 3 significant figures.)
1 Review l Constants Part A 30.0 g of dry ice (solid CO2) is placed in a container which has an initial volume 2.00x104 cm. then all the air is quickly pumped out and the container is sealed. The container is warmed to 0°C-a ternperature at which CO2 is a gas. How many moles of CO, were placed in the container? EVO AXO th 0 ? 12 = moles Submit Request Answer Part B What is the gas pressure? Give...