7. A mass m = 0.043 kg of benzene vapor at its boiling point of 80.1 °C is to be condensed by mixing the vapor with water at 43 °C. What is the minimum mass of water required to condense all of the benzene vapor? Assume that the mixing and condensation take place in a perfectly insulating container. grams

Water at 16.0 °C is sprayed onto 0.230 kg of molten gold at 1063 °C (its melting point). The water boils away, forming steam at 100.0 °C and leaving solid gold at 1063 °C. What is the minimum mass of water that must be used? mw =

15. The adiabatic index of a gas is given by which of the following? a. Cp/Cv b. Cv/Cp C. Cp-Cv d. Cpt Cv O B D OA OC Question 10 C

9. A rigid tank contains 73.5 g of chlorine gas (Cl2) at a temperature of 74 °C and an absolute pressure of 5.30 × 10° Pa. Later, the temperature of the tank has dropped to 40 °C and, due to a leak, the pressure has dropped to 3.40 × 10° Pa. How many grams of chlorine gas have leaked out of the tank? (The mass per mole of Cl2 is 70.9 g/mol.) SSI f60 ssfo 50 ssf60 sf60 ssi

Choose the correct answer 1. You have a 90 cm long iron rod at 15 ° C that heats up to 300 ° C. What happens with the rod is that: A. It melts. B. Double the length. C. Decrease its length a few centimeters. D. Increase its length by a few millimeters. 2. A student blows up a balloon and places it in his home freezer. After a long time, the balloon is removed from the freezer and it is observed that: A. The volume decreases as a certain amount of air escapes. B. It remains the same, because the air inside it does not expand or contract. C. The volume increases, because the air inside it expands D. The volume decreases as the air inside it contracts

1. People buying food in sealed bags at high elevation often notice that the bags are puffed up because the air inside has expanded. A bag of pretzels was packed at a pressure of 1.00 atm and a temperature of 22.0 C. When opened at a summer picnic in Santa Fe, New Mexico, at a temperature of 32.0 C, the volume of air in the bag is 1.13 times its original volume. What is the pressure of the air P Santa Fe? = 0.079 Santa Fe X atm

2. A spherical balloon is made from a material whose mass is 2.90 kg. The thickness of the material is negligible compared to the 1.25 m radius of the balloon. The balloon is filled with helium (He) at a temperature of 300 K and just floats in air, neither rising nor falling. The density of the surrounding air is 1.19 kg/m and the molar mass of helium is 4.0026x10-3 kg/mol. Find the absolute pressure of the helium gas. Pa

4. Ideal Gas Type Question: A piston comprises two nested cylinders which are 3 cm and 2.8 cm in diameter with 0.1 cm thick walls and are each 1 m long. Initially, the smaller cylinder sits completely inside the larger cylinder and is filled with N2 at 20 °C and atmospheric pressure. a. C. The gas is slowly heated, while the cylinder is allowed to freely expand. What kind of process is this? banc b. The smaller cylinder has a total mass of 1.5 kg. What temperature does the gas need to be for the cylinder to become fully extended? The cylinder can withstand an internal pressure of 20 atm. What's the maximum weight it can lift? e. d. A 100 kg weight is dropped on the cylinder while it is fully extended, causing it to rapidly compress. What kind of process is this? If the cylinder is fully depressed by this event, what is the peak pressure? The adiabatic constant for N2 is 7/5. f. If the weight is dropped from 2 m, assuming 1% of its energy is converted into thermal energy in the gas,…

A hot air balloon uses the principle of buoyancy to create lift. By making the air inside the balloon less dense then the surrounding air, the balloon is able to lift objects many times its own weight. A large hot air balloon has a maximum balloon volume of 2090 m3. a.  If the air temperature in the balloon is 54 °C, how much additional mass, in kilograms, can the balloon lift? Assume the molar mass of air is 28.97 g/mol, the air density is 1.20 kg/m3, and the air pressure is 1 atm.

8. A rigid tank contains 71.5 g of chlorine gas (Cl₂). a temperature of 70 °C and an absolute pressure of 5.80 x 105 Pa. Later, the temperature of the tank has dropped to 32 °C and, due to a leak, the pressure has dropped to 3.30 x 105 Pa. How many grams of chlorine gas have leaked out of the tank? (The mass per mole of Cl₂ is 70.9 g/mol.) 9 6 ntm 2