You are given a frozen sample of an unknown substance. The sample has a temperature of 4K and a mass of 10g. You put the frozen sample in a closed container of volume 10L and heat it slowly to 120degC. At this point, the complete sample has evaporated and is in the gas phase. You measure a pressure of 117kPa inside the container. Which substance is it?

Suppose you have a closed rigid container of air at 20 Celsius on the surface of the Earth. We change  the temperature of the container to 48 Celsius, leaving it closed, and read a pressure gauge attached to the container.  Initially the reading was 101 KPa (kilopascals, or 1000 N/m2).  What is the new reading? Give your answer in KPa.

Incandescent lightbulbs are filled with an inert gas to lengthen the filament life. With the current off ( at T = 20.0 degrees Celsius ), the gas inside a lightbulb has a pressure of 113 kPa. When the bulb is burning, the temperature rises to 89.4 degrees Celsius. What is the pressure at the higher temperature?

You happen to come across a piece of metal that has a density of p 8.12 g/cm3 when the temperature is To = 42.5 °C. If the metal is cooled to a temperature of T1 0.00 °C, does the density change? Yes, the density will decrease since the volume changes. Yes, since the metal contracts and the mass is constant, the density will increase. No, because as the volume changes so does the mass. No, density does not depend on temperature. Calculate the density of the piece of metal at this temperature, P1. The coefficient of volume expansion for this piece of metal is B = 7.62 x 10-5 1/°C. -0.0263 Pi = g/cm3 Incorrect

A gas condensed in a cylinder with a nozzle is initially at p_1=2000 Pa, V_1= 2.0 l, and t_1=300 K. a) If the volume decreases to 0.50 L while the temperature remains low, what is the new pressure?b) If in a) the temperature increases to 400 K when the volume changes, what will be the new pressure?

A hot air balloon holds 7.40 x 107 liters of gas. In order for the hot air balloon to rise into the sky, it must be heated to 120°C. Once the balloon is up in the air, the air needs to be cooled in order for the balloon to land. If the temperature of the balloon is decreased to 40.0°C, what will the new volume of the gas be? SOMEONE PLEASE HELP ME!!

33. A bicycle tire has a pressure of 7.00 × 10° N/m² at a temperature of 18.0°C and contains 2.00 L of gas. What will its pressure be if you let out an amount of air that has a volume of 100 cm³ at atmospheric pressure? Assume tire temperature and volume remain constant.

A Goodyear blimp typically contains 5300 m of helium (He) at an absolute pressure of 1.10 x 10 Pa. The temperature of the helium is 275 K. What is the mass (in kg) of the helium in the blimp? Number Units the tolerance is +/-2%

Suppose you have a closed rigid container of air at 20 Celsius on the surface of the Earth. We increase the temperature of the container to 77, leaving it closed, and read a pressure gauge attached to the container.  Initially the reading was 101 KPa (kilopascals, or 1000 N/m2).  What is the new reading? Give your answer in KPa.

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.