The temperature inside of a house is 27 ºC and outside is –23 ºC ? Determine the change in entropy of the universe in an irreversible process where the house loses 2250 J of heat to the outside environment.  A. 0.5 J/K B. 1.5 J/K C. 2.5 J/K D. 3.5 J/k E. 4.5  J/K

Study Guide Mix n Match:       Heat is Energy moving from low temperature to high temperature. Energy moving from high temperature to low temperature. The same as temperature.       The First Law of Thermodynamics defines The principle of entropy. The Law of heat addition. The conservation of heat.         The greater the difference in temperature between the input                         reservoir and the output reservoir of a heat engine, the Greater the efficiency. Less the efficiency. Efficiency is not affected by temperature.           A Carnot engine Can never be 100% efficient. Can sometimes be 100% efficient. Is always 100% efficient.         When a water is going through a phase change from liquid to gas It gives up 540 cal/g of heat. It absorbs 540 cal/g of heat. It makes a 100oC temperature change.          Displacement is a Scalar Quantity Vector Quantity MKS Quantity        The acceleration at the peak of the rise of a projectile is Equal…

#2. Suppose 2.35 moles of an ideal gas expands to twice its volume isothermally at 298 K. A) How much work is done by the gas? B) Show the work done on a pressure-volume (P-V) graph C) What is the change in entropy of the gas?

24

Q2/ Solve the following: 1. Prove that the thermal efficiency of a heat engine is QL = 1- Nen QH 2. Prove that V avg Vf9 x = Q3/ Define the following: Adiabatic Process Нeat Thermal Efficiency Heat Engine Q4/ Write the mathematical equation for the following Enthalpy Ideal-gas equation of state Entropy Specific gravity COPR Pascal's law СОРНР Vacuum pressure

A gas expands from 2.2 L to 3.6 L against a constant external pressure of 1.6 atm. What is the work done?   A. -227 J  B.  227 J  C. 2.24 J  D. -2.24 J

Match each of the terms given below with the particular constraints that it implies about a thermodynamic process. isothermal isobaric A. dq = 0 Β. ΔΡ = 0 C. dw = 0 D. AV = 0 isochoric ◆adiabatic E. An = 0 F. AT=0

A block of ice at 273K is put in thermal contact with a container of steam at 373K, converting 25.0g of ice to water at 273K while condensing some of the steam to water at 373K.  A) find the change in entropy of the ice  B) find the change in entropy of the steam C) find the change in entropy of the universe

The figure shows the temperature of water as a function of time as it is being heated. There are 2 intervals when the temperature doesn’t change. This is because: A. The pressure remains constant B. The heat is transformed into work C. The entropy remains constant D. The phase is changing E. The thermal energy remains constant

4. The first law of thermodynamics states that a. components of a system interact. b. entropy of a closed system always increases. c. closed system always shifts toward disorder or homogeneity. d. Energy is always conserved. 5. According to the second law of thermodynamics, the heat received from a high temperature reservoir by a heat engine operating in a complete cycle a. must be completely converted to work. b. equals the entropy increase. C. converted completely into internal energy. d. cannot be completely converted to work.