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Chemistry

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Laurence Kemmer

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โˆ™ 2021-10-08 18:34:34
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Cards in this guide (21)
Is tin more reactive than iron

Yes, tin is more reactive than iron. Tin is more reactive because it is higher up on the list of metals containing more ion.

When baking soda is mixed with vinegar which type of reaction has taken place

its a chemical reaction

Liquids have higher coefficients of expansion than solids do in general

that is TRUE

A horizontal line on a phase-change graph indicates

a phase change

The temperature of an object is a measure of the average thermal energy of the molecules in the object

FALSE (APEX)

Swamp coolers are effective because

the water's latent heat of vaporization is being pulled from the air, the water pulls heat from the room to undergo a phase change.

Changing subscripts is one of the steps of balancing a chemical equation

false

The of an acid and a base is determined by how completely they dissociate in water

The _____________ of an acid and a base is determined by how completely they dissociate in water.

strength

On a cold winter day the flow of heat is from the outside in

Falseee

A horizontal line on a phase change graph indicates

A horizontal line on a phase change graph means there has been no change. Often longer periods of research are needed to see significant change.

Combustion reaction occurs when a substance usually containing carbon reacts with oxygen to produce energy in the form of heat and

A combustion reaction occurs when a substance, usually containing carbon, reacts with _oxygen_ to produce energy in the form of heat and light.

The sum of the kinetic energies and potential energies of all of in the molecules in a substance is called the what energy of the substance

thermal

What temperature Fahrenheit and celsius thermometers would read as the same number

negative 40 degrees

Is the temp of an object a measure of the total kinetic energy of molecules in the object or a measure of the average kinetic energy per molecule in the object

True-apex

When a substance goes directly from a gaseous state to a solid state as dry ice does what

Desublimes

What is it called when one or more substances change into one or more new substances

This is a chemical reaction.

What substance below requires the most energy to raise its temperature by 7 degrees C

gold

On a cold winter day does the cold from outside moves into the house primarily through the windows

True

Is Sixty-five degrees Fahrenheit about 18 degrees Celsius

Yes, 18°C is 64.4°F, and 65°F is 18.33°C

Is Ninety degrees Fahrenheit is about 32 degrees Celsius

Yes, 90 degrees Fahrenheit is about 32 degrees Celsius

On a very hot summer day, railroad tracks can buckle, causing train delays and derailments. Select the best reason below for the buckling

The metal undergoes thermal expansion.

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