E157 (PRELIM) THERMODYNAMICS

The study of heat energy that is involved in chemical and physical changes is

• efficiency

• thermodynamics

• equilibrium

• calorimetry

Chemical reactions that absorb heat energy are called __________ and have a __________ enthalpy.

• exothermic, positive

• exothermic, negative

• endothermic, positive

• not identified

Whether a chemical reaction or physical change takes place depends on both the enthalpy and the __________ of the process.

• entropy
• equilibrium
• energy
• all of these

Both the enthalpy and the entropy are combined to calculate the

• reaction time
• free energy
• bound energy
• none of these

The free energy term provides information regarding the __________ of a chemical reaction.

• spontaneity
• luminosity
• reactivity
• all of these

Thermodynamics give chemists an idea of which direction the minimum __________ of a given reaction lies.

• reaction time
• reaction volume
• potential energy
• none of these

A(n) _____________ is a device for measuring temperature.

• thermometer
• psychrometer
• anemometer
• barometer

Temperature is a measure of the...

• total energy in a substance
• total kinetic energy in a substance
• average potential energy in a substance
• average kinetic energy of molecules in a substance

A slower particle has a lower energy than an identical, faster particle.

• true
• false
• neither
• can not be determined

The transfer of thermal energy between objects of different temperatures is called...

• temperature
• internal energy
• heat
• none of these