Problem 5 Consider a substance that has a melting temperature of T= 159 K at p=1 atm and a melting enthalpy of AHm = 4900 J/mol. Determine the entropy of melting the substance.
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- A cylinder of gas has a temperature of 32F. a) If 205J is added to the system at constant temperature, what is the change in entropy of the system? b) How hot should the gas be in degrees Celsius if the molecules inside are to have twice the kinetic energy?A 1 500-kg car is moving at 20.0 m/s. The driver brakes to a stop. The brakes cool off to the temperature of the surrounding air, which is nearly constant at 20.0°C. What is the total entropy change?On a hot summer day, 2.00 x 10° J of heat transfer into a parked car takes place, increasing its temperature from 35.5°C to 44.4°C. What is the increase in entropy (in J/K) of the car due to this heat transfer alone? J/K Additional Materials CS Scanned with CamScanner O Reading
- 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 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?Q3 1 kg of liquid water at 77°C mixed with 1 kg of liquid water at 17°C until thoroughly mixed. Find: a) the final temperature of the mixture b) the entropy change of the hot water c) the entropy change of the cold water d) the total entropy change Given: the specific heat of liquid water is 4.2 kJ kg-¹ K-¹