MEGR 3111 Thermo Test #1 Questions with Correct Answers Graded A+

MEGR 3111 Thermo Test #1 Questions with Correct Answers Graded A+ Closed System / Control Mass - Answers only heat and work cross the system boundary Open System / Control Volume - Answers work, heat, and mass cross the system boundary Stationary Power Plant - Answers converts stored energy into work Moving Power Plant - Answers think vehicle propulsion ex. refrigeration/AC, biological systems, ecological systems System - Answers Subject/object of study Surroundings - Answers everything that is not the system System Boundary / Control Surface - Answers line separating the system from the surroundings Entropy - Answers the measurement of organization of molecules Property - Answers observable, measurable, quantity describing an aspect of the system Extensive Property - Answers depends on the amount or size of the system Intensive Property - Answers independent of the amount or size of the system ex. pressure, temperature, density Extensive to Intensive - Answers divide by mass Specific Property - Answers The intensive version of an extensive property ex. Volume (m^3) to Specific Volume (m^3/kg) Physical Quantity - Answers characterized by dimensions Primary: mass, length, time Secondary: velocity, volume Density / Specific Volume - Answers mass per unit volume Pressure - Answers normal force per unit area 1 Pa = - Answers 1 N/m^2 1 bar - Answers 10^5 Pa 1 MPa - Answers 10^6 Pa Thermometer - Answers an object with at least one measurable property that changes as its temperature changes Thermometric Property - Answers any physical property that changes measurably with temperature Kelvin Scale - Answers absolute thermometer scale using SI unit Kelvin (K) Rankine Scale - Answers the english unit equivalent to the Kelvin Scale Temperature Unit Conversions - Answers T(R) = 1.8 T(K) T(C) = T(K) - 273.15 T(F) = T(R) - 459.67 T(F) = 1.8 T(C) - 32 Equilibrium - Answers a state of balance, no driving force for change Process - Answers when a system undergoes a change from one equilibrium state to another Process Path - Answers a plot of the series of equilibrium states through which a system passes as it moves towards its final state