1. A 50.0 g sample of lead starts at 22°C and is heated until it absorbs 8.7 × 10 J of energy. Find the final temperature of the sample. [c = 1.3 × 10²J/kg • oC].

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

1. A block of iron with a mass of 2.00 kg is initially at a temperature of 600° C. It is dropped into an insulating container that holds 0.400 kg of ice initially at -15.0° C and 0.700 kg of water that is initially at 25.0° C. What will be the final temperature of the system? (Hint: all of the ice melts, you're welcome)

The temperature of a 63 g sample of an unknown substance is raised from 28° C to 86° C when 390 calories of heat are added . What is the specific heat of the sample , in cal/g . C ? Enter your calculated value to the nearest .001 cal/g . 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

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