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Enthalpy

Enthalpy

Assessment

Flashcard

Science

6th - 8th Grade

Hard

Created by

Barbara White

FREE Resource

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16 questions

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1.

FLASHCARD QUESTION

Front

Thermodynamics Noun

[thur-mo-dy-nam-iks]

Back

Thermodynamics


The branch of science concerned with heat and temperature and their relation to energy and work in physical systems.

Example: This diagram shows how adding heat energy (enthalpy) to water changes its state from solid ice to liquid water and then to gaseous steam.
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2.

FLASHCARD QUESTION

Front

Thermochemistry Noun

[thur-mo-kem-iss-tree]

Back

Thermochemistry


The study of heat energy associated with chemical reactions and physical transformations, focusing on energy changes during these processes.

Example: This image shows a chemical reaction in a test tube absorbing energy from its surroundings, represented by the arrows pointing inward, illustrating an endothermic process.
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3.

FLASHCARD QUESTION

Front

System Noun

[sis-tuhm]

Back

System


The specific part of the universe that is of interest for study, separated from its surroundings by a boundary.

Example: In science, a 'system' is the specific part of the universe being studied, separated from the 'surroundings' by a 'boundary'.
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4.

FLASHCARD QUESTION

Front

Surroundings Noun

[suh-round-ings]

Back

Surroundings


Everything external to a defined thermodynamic system with which the system can exchange energy and/or matter.

Example: The 'system' is the chemical reaction (in the beaker), while the 'surroundings' is everything outside it, like the air, which exchanges heat.
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5.

FLASHCARD QUESTION

Front

Heat (q) Noun

[heet]

Back

Heat (q)


The transfer of thermal energy between objects due to a temperature difference, typically flowing from a warmer to a cooler body.

Example: The diagram shows heat flowing from a hot object to a cold object, demonstrating that heat is the transfer of thermal energy due to a temperature difference.
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6.

FLASHCARD QUESTION

Front

Temperature Noun

[tem-per-uh-cher]

Back

Temperature


A measure of the average kinetic energy of the particles in a substance, indicating its degree of hotness or coldness.

Example: This thermometer measures temperature, the average kinetic energy of particles, in Celsius and Fahrenheit. Temperature changes are used to calculate changes in enthalpy (heat).
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7.

FLASHCARD QUESTION

Front

Enthalpy (H) Noun

[en-thal-pee]

Back

Enthalpy (H)


The total heat content of a system, representing its internal energy plus the product of its pressure and volume.

Example: This diagram shows enthalpy as the energy level of a chemical system. In an endothermic reaction, products have higher enthalpy than reactants, requiring energy input.
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