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Chemistry

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Cecile Heidenreich

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Cards in this guide (12)
What is thermodynamics

the study of the movement of energy and heat.

or

Thermodynamics is the branch of physics concerned with the conversion of different energy forms.

•DeltaG (rxn) = DeltaG (pdts) - DeltaDG (rcts) •DeltaG°(rxn) = -R T ln K •

What does temperature measure

Temperature measures how fast molecules are moving or in scientific terms it measures the AVERAGE KINETIC ENERGY in a system. Temperature measures how fast molecules are moving. :):)

Why are alloys useful

Alloys are useful (if this is what the question is getting at) because mixing elements of the periodic table alters their colligative properties.

i.e. mixing two metals could change substance's melting point, allowing it to more easily resist high temperatures. Also, mixing metals can change the way they bind together, and create an altogether stronger material than you can find using any single metal alone.They can improve a metal's properties

What forces hold network solids together

All chemical bonds, including those found in network solids, derive from the electromagnetic force. Positively charged protons attract negatively charged electrons. Although atoms start off with an equal number of protons and electrons, and are therefore electrically neutral, the electrons rearrange themselves in ways that create attractions between atoms. Covalent bonds

How would the kinetic theory address

Vibrations in molecules

What does it mean if a solid is malleable

bendable

Who created the model of the atom that has quantizied levels of energy
What structural units make up ionic solids

ions

Which of the following could a magnet float over network solid semiconductor superconductor molecular solid

A superconductor.

What is the significant force that attracts water molecules polar molecules to each other

hydrogen bonding

What usually has lower melting points than ionic solids

Molecular solids

Which of the following is an example of a heterogeneous mixture water saltwater dirt or brass

Dirt is a heterogeneous mixture.

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