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  • enthalpy
What Makes Things Go Boom?
Read the Fine Print
Educational Use
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Most students point to Walter White as a chemistry anti-hero—using crystalized fulminated mercury, disguised as crystal meth, as a grenade to blow up a drug lord that wronged him. Explosions are engaging, exciting parts of chemistry, yet dangerous to society when unplanned, such as unexpected water heater explosions. This unit will look at the components that make reactions spontaneous and explosive, including energy, enthalpy, entropy, and how they apply to physical and chemical changes. Focus will be on quantifying reactions and phase changes and working on the match concepts connected to kinetics and thermodynamics. To keep students engaged with the complex mathematical components, students will be using each lesson as a way to research and explore exciting explosions, such as that in Breaking Bad, and water heater explosions, building a model of their understanding. After finalizing their model of explosions, students will then apply their model to a community issue, such as air-bag safety. Students will design a safe and effective airbag that incorporates multiple concepts from the unit, and includes quantifications to ensure their safety.

Subject:
Chemistry
Physical Science
Material Type:
Lesson Plan
Unit of Study
Provider:
Yale-New Haven Teachers Institute
Provider Set:
2016 Curriculum Units Volume IV
Date Added:
08/01/2016
hx Diagram (Mollier)
Unrestricted Use
CC BY
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Interactive hx diagram (Mollier) for displaying the changes in state of humid air at sensible temperature change, wet cooling, mixture air, humidification and custom state points.
Automatic calculation of the required heat flow for cooling and heating. Free online tool, no registration required.

More detailed information:
To analyze changes of state of moist air normally a diagram with the specific enthalpy as the ordinate and the humidity ration as the abscissa is used. This specific type of diagram was proposed in 1923 by the German professor of applied physics and mechanics, Richard Mollier.
The Mollier diagram is respectively created for a certain constant pressure, usually the atmospheric pressure (p≈1bar).
The thermodynamic properties of moist air are represented in the state diagram as lines of constant state variables - so-called isolines.

Subject:
Applied Science
Engineering
Mathematics
Measurement and Data
Physical Science
Physics
Material Type:
Diagram/Illustration
Interactive
Date Added:
03/10/2021