Energy of State Changes

The total energy in a system is ____________.

The following equation describes a change in Gibbs energy

The formula to interpret melting point is:

The following statement is not true:

• Energy is not needed we a substance changes from solid to liquid.

• Freezing the water that takes up to build an iceberg takes a lot of time, therefore taking a lot more energy.

• A substance's entropy of vaporization is much larger than its entropy of fusion.

• Particle motion is more random in the liquid state.

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The enthalpy of vaporization of butane, C4H10, is 20.44 kJ/mol, and the entropy of vaporization is 80.2 J/mol•K. Calculate: Butane's molar mass and the boiling point for Butane.

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When gases spread out, a system reaches a state of maximum _________.