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Rom4ik [11]
3 years ago
8

How do you do Calorimetry? We've had it in class for about a week and I still don't understand it so does anyone have any simple

step by steps for it?
Chemistry
1 answer:
Ede4ka [16]3 years ago
8 0

It basically works like this:

You dry out the food

put it in this ceramic oven thingy surrounded with water

burn the food

the water will heat up

measure the water temperature in f

= calories

Calorimetry is the science or act of measuring changes in state variables of a body for the purpose of deriving the heat transfer associated with changes of its state due, for example, to chemical reactions, physical changes, or phase transitions under specified constraints.

in this case, you're finding the amount of energy is contained within it when combusted

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A reaction produces 0.809 moles of h2o. how many molecules are produced?
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Use Avogadro's number which is numerically equal to ...

( 6.02 multiply by 10 to the power of negative 23) 


Avocado's number is the number of particle(molecules, ions, atoms)  present in one mole of substance.

number of molecule in 0.809 mole of h20 = ....

one mole of h20 contains (6.02* 10^-23)

0.809 mole contains....(6.02* 10^-23) (0.809)
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B and C

Explanation:

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Matter with indefinite shape and volume"
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When the reactive alkali metal sodium is reacted with poisonous chlorine gas, sodium chloride or table salt is produced. Is mass
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Yes, Mass is conserved.

Explanation:

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     Equation:

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From the equation above, one can observe that the reaction started using 2 atoms of Na and it produced 2 atoms of the same element in NaCl. A molecule of Cl produced 2 atoms of Cl in the NaCl

Design a simple experiment to support your answer:

Aim: To demonstrate the law of conservation of mass

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1 molecule of Cl containing two atoms of Cl will weigh 2 x 35.5 = 71g

Total mass of reactants = mass of 2Na + 1Cl₂ = (46 + 71)g = 117g

On the product side, Mass of 1 NaCl = 23+ 35.5 = 58.5g

Two moles of NaCl will give 2 x 58.5g = 117g

Since the mass on both side is the same, one can say mass is conserved.

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