Thermochemistry

If a chemical reaction absorbs heat energy, the temperature of the surroundings will:

• go up

• go down

• stay the same

Temperature scale with zero as the melting point of water (ice):

• Fahrenheit

• Celsius

• Kelvin

Adjective for a reaction or process that had a positive enthalpy change (delta H value).

• endothermic

• exothermic

• hypothermic

This type of reaction is exothermic, and the heat produced from it helps heat homes and power our vehicles.

• synthesis

• combustion

• decomposition

• single replacement

What is the sign of H or enthalpy in a heat pack that releases more heat than it takes in, therefore heating cold hands.

• positive

• negative

• zero

By definition, the value of this energy term is always zero for the most stable form of an element at standard conditions of 298 Kelvin T and 1.0 atom P.

• heat of reaction

• heat of formation

• heat of fusion

• heat of vaporization

Name of the Greek letter that is used as a symbol for a change in any quantity, such as temperature.

• alpha

• beta

• omega

• delta

According to his law, the enthalpy change for a reaction can be calculated as the sum of the enthalpy changes for individual steps that add up to the overall reaction.

• Hess

• Boyle

• Mendeleev

• Dalton

Measurement of the heat made in chemical reactions and physical changes.

• calorimetry

• spectrometry

• chirality

• conductivity

Adjective for when heat is more released from more than taken into a system.

• endothermic

• exothermic

• hypothermic