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PHY101

Question: The relationship between Cp and Cv is given by	
Answer: Cp-Cv=R

Question: When the material of the fluid is forced to carry the heat from one place to another by a blower or pump, the process is
Answer: forced convection

Question: The heat required to raise the temperature of 1mole of the gas at constant pressure by 1 k is	
Answer: molar heat capacity at constant pressure

Question: Heat is transferred in fluids by
Answer: convection

Question: One mole of a gas has a volume of 2.23x10-2m2 at a pressure of 1.01x105 pa(N) at 00c. If the molar capacity at constant pressure is 28.5Jmol-1 k-1. calculate the molar heat capacity at constant volume
Answer: 25.25Jmol-1 k-1

Question: When a gas is allowed to expand without heat entering or leaving the gas the process is called	
Answer: adialatic

Question: When a gas is allowed to expand at constant temperature the process is called
Answer: isothermal

Question: When the material fluid carries the heat from one place to another due to the difference in density as a result of thermal expansion, the process is	
Answer: natural convection

Question: All of these are factors affecting the conduction of heat except	
Answer: the current flow through the material

Question: A long steel rod, insulated to prevent heat losses, has one end immersed in boiling water (at atmospheric pressure) and the other end in a water-ice mixture. If the steal rod is 100cm long and area of 5cm2, after establishing a steady state condition, how much heat per second is transferred from the steam bat to the ice- water mixture? (k for steal = 50J(sm0c)-1?
Answer: 2.5Watt




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