E30 Q's
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- List eight properties of a simple, compressible substance
- pressure, volume, mass, temperature, internal energy, enthalpy, specific internal energy, entropy
- List two macroscopic forms of energy for a simple, compressible substance
- kinetic energy, potential energy
- What distinguishes a control mass from a control volume?
- Control mass means the mass in the system is constant, control volume allows movement of mass, but at a constant volume in the defined system
- How many properties need to be defined before the state of a simple, compressible substance is completely defined?
- 2 (1 temperature and 1 work related)
- Is ideal gas behavior approached at high densities or low densities
- low densities
- Define the quality (x) of a two-phase liquid-vapor mixture
- the relative amount of vapor in the liquid-vapor mixture
- Of the properties T, P, and v, list those on which the internal energy of ideal gas depends
- T
- The temperature and pressure at which the liquid and vapor phases of a simple, compressible substance become indistinguishable is called the
- critical point
- What is the kinetic energy of system having mass M moving at velocity V?
- (1/2)MV^2
- What is the difference between cp and cv for an ideal gas?
- R
- Ice is heated at constant pressure until it just starts to melt. As additional incremental quantities of energy are added as heat, does the specific volume of the saturated solid-liquid mixture increase, decrease, or stay the same?
- decrease
- Are the intermolecular forces between molecules strongest in the gas phase, liquid phase, or solid phase?
- solid phase
- Define specific enthalpy in terms of pressure, specific internal energy, and specific volume.
- h = u + Pv