Test 3 (Energy Balance)

What are the types of energy and their equations?

Kinetic, Potential, and Internal.

General Balance Equation for Energy Balance

What is an open system, what is a closed system?

Energy Balance on Closed System

What are the simplifications of each component in the Energy Balance Equation?

Difference in balance for open system.

What are Specific properties and what is enthalpy?

Steady State Balance

Example Energy Balance

Get Familiar With Units (acceleration, Force, power, etc)

What is a state property, what is the reference state?

A state property, is a property that is simply dictated by its environment/state. Q and W are not state properties because they depend on the path taken. The reference state is just any defined condition initially, to compare it to a final value (U^=0 and H^=0).

What is the difference between saturated and superheated vapor?

Saturated vapor is when vapor pressure = pressure, meaning the gas and liquid are in equilibrium and it lies on the vapor-liquid equilibrium line. A superheated vapor, is a larger temperature than the equilibrium line.

Energy Balance Procedure

Example 7.6-1

Mechanical Energy Balance and Bernouli Equation Derivation

Hypothetical Process Paths

Estimating U and H for varying pressure at a constant temperature.

What is sensible heat?

Heat capacity constant volume

Heat Capacity Constant Pressure

Mean Heat Capacity

What are some simplifications of Delta H and Heat Capacities for mixtures?

3 Phase Changes. What is the difference between latent heat and sensible heat?

Latent heat is the heat associated with phase changes while sensible heat is the heat associated with temperature changes.

What is Standard Heat of Change

The latent heat for a substance at 1 atm and its phase change temperature.

Hypothetical Process Path

Estimation of Latent Heat (Trouton’s Rule)

Estimation of Latent Heat (Claussius Clayperon)

Estimation of Latent Heat (Watson Correlation)