A rigid box contains 0.9 mol of an ideal monoatomic gas. Heat is added to the gas and its temperature changes from 183 K to 295 K. If this is a reversible process, what is the change in entropy of the gas in J/K?

The temperature at the surface of the Sun is approximately 5,600 K, and the temperature at the surface of the Earth is approximately 291 K. What entropy change of the Universe occurs when 4.50  103 J of energy is transferred by radiation from the Sun to the Earth? ____________ J/K

Suppose a heat engine design makes a square on a PV diagram, using a monatomic gas. The high pressure is 3P and low pressure is P. The high volume is 3V and low volume is V. What is the efficiency of the heat engine?

An ideal gas is stored inside an insulated cylinder. The gas is reversibly compressed to half of its initial volume. Now the pressure is 2.5 times its initial pressure. If it is a monoatomic gas. What happens to the gas entropy? Select one: O Not enough information to answer the question O Not Given O Decreases O Increases because of second law O No change

E) All statements are false. 15- Consider two equal volumes of Helium, each have the same temperature, pressure and number of molecules and entropy S. If we mix the two volumes what would be the change in entropy? A) 25 B) S C) 2ks In2 D) kat In2 E) None of these S 3 4 et 5 6 7 8 9 10 11 12 13 14

A box contains 100 gas molecules all released on the left side of the box. What is the initial entropy of all the gas molecules on one side? You can calculate the number of microstates (left/right distribution of molecules) possible by the equation W = N! / ( nL! * nR!,) where N is the total number of molecules and nL is the number on the left and nR is the number on the right. What is the entropy of the most disorganized distribution of gas molecules?

A Styrofoam cup holding 142 g of hot water at 1.00 ✕ 102°C cools to room temperature, 21.0°C. What is the change in entropy of the room? (Neglect the specific heat of the cup and any change in temperature of the room. The specific heat of water is 4,186 J/(kg · °C).)__________ J/K

A roller coaster car has a mass of 2,895 kg when loaded with people. The car is rolling down a steep hill. When the car is 12.5 m above the ground its velocity is 3.11 m/s. Assuming we can ignore friction, use energy principles to determine the initial gravitational potential energy (EGi).

The temperature of two identical gases is increased from the same initial temperature to the same final temperature. Reversible processes are used. For gas A the process is carried out at constant volume while for gas B it is carried out at constant pressure. Is the change in entropy for A greater than for B? Why? Show detailed explanation in terms of its pressure, temperature, and volume.

You would like to raise the temperature of an ideal gas from 295 K to 960 K in an adiabatic process. a)What compression ratio will do the job for a monatomic gas?  b)What compression ratio will do the job for a diatomic gas?