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Chemistry

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Isaac Batz

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Cards in this guide (19)
How does a gas do work

By changing volume

Alyssa R. =]

A mole is objects

6.022x10^23

It doesn't seem right but it is, i missed the question because i didn't put this.

If 800 joules of heat are added to a gas in an isochoric process what is the change in its internal energy

800j

Which item requires the least energy to increase its temperature lounge chair sand or water Explain your answer in terms of this item's specific heat

Sand needs least energy to increase the temperature as its specific heat is very low compared to that of water. Water needs more energy to increase its temperature as its specific heat capacity is higher.

Which of the four thermal processes describes the pressure volume relationship at a constant temperature

Boyle's Law

PV=K or P1V1=P2V2

What is the balance chemical equation for the first law of thermodynamics

There is no chemical equation for the first law of thermodynamics, which is that energy can be neither created nor destroyed. This is a more general principle than any chemical equation.

How would you go about storing the extra oxygen and air that would continuously provide fresh air to the astronauts

having air pockets in the resperater of the astronuat's suit

If the boats engine has a heat input of 40000 J with 30000 J exhausted into the surroundings the heat sink what is its efficiency

efficiency = output/input

therefore, in above case it is 3/4= 0.75

or 75%.

It isn't possible to transfer heat from an object at a lower temperature to another object at a higher temperature unless

It isn't possible to transfer heat from an object at a lower temperature to another object at higher temperature unless work is done to the system. An example of this is a refrigerator.

What affects the half life

The type of isotope

If you put ice and lemonade in a Styrofoam cup what would happen after 20 minutes

You get diluted lemonade.

Assume your lungs have a capacity of 0.5 l at the waters surface as you dive the water pressure increases to twice its surface value what is your lung capacity at this location

this is apex right? im figuring it out too.

0.5l and it increased by 2. so i think the real question is, does lung capacity increase or decrease as pressure increases.

and i think it decreases. so divide by 2

0.75

How does water pressure affect a submarine

When a submarine goes farther down in the water, the water pressure becomes greater. If the submarine goes to far, pipes can explode and let in water, or it can implode the submarine

Which of the following is not a valid equation for describing the behavior for gases

The question is incomplete.

No options (for which of the following) are given to answer the question.

What is the missing number in the nuclear reaction 233 92 U-- 4 2 He

229 apex

How computers deals with heat

They use a heat sink

What is the Latin root for ruins

ruina -ae f. [falling down , collapse, ruin, destruction; the ruins of a building, debris].

Sources: etymonline.com; Cassell's Latin Dicitonary.

Is the molar mass of gas dependant on the type of gas

Yes as is the molar mass of anything else.

I’m a nuclear reaction which of the following must be conserved

Charge

The count of nucleons

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