Graph of the relationship between mass and thermal energy
1 answer:
<em>Thermal energy</em> is the sum of the kinetic and potential energies of all the particles in an object.
Assume that you have 250 gL of water and 1 kg of water at the same temperature.
Then, each water molecule has the same kinetic energy.
The larger sample contains four times as many molecules, so it contains four times as much thermal energy.
Thus, thermal energy is directly proportional to mass.
In symbols, <em>KE </em>∝ <em>m</em> or <em>KE = km</em>.
The graph of a direct proportion is a <em>straight line passing trough the origin</em>.
It should look something like the graph below.
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Explanation:
An ionic equation will be the one in which all the participating species will be present as ions.
The given reaction will be as follows.
Balancing this equation by multiplying by 2 and
by 3 on reactant side. Whereas multiply KBr by 6 on product side.
Hence, the net ionic equation will be as follows.
As both and
are spectator ions. Hence, the net ionic equation will be as follows.
The collision and decomposition of 2 ammonium nitrate molecules results in the formation of 2 molecules of and 4 molecules of
Ammonium nitrate decomposes to produce nitrous oxide and water according to the following equation:
In the above, a mole of ammonium nitrate decomposes to form a mole of nitrous oxide and 2 moles of water.
If moles of ammonium nitrate decomposes, the equation becomes:
Thus, 2 moles of nitrous oxide and 4 moles of water would be formed.
More on decomposition reactions can be found here: brainly.com/question/8009068
Answer:
A. 4500 mL
Explanation:
We need to use a version of the combined gas law, which states:
, where T represents temperature, V volume, and n moles
First, look at the initial values of n, V, and T:
- n: we have 10.0 grams of hydrogen, which we need to convert to moles. So:
- V: we have a volume of 5.0 L
- T: our temperature right now is 28.0°C, but we need it in Kelvins, so add 273: 28.0 + 273 = 301 K
Now look at the final values:
- n: our final number of grams is 8.5 grams of hydrogen, so we need to convert this to moles.
- V: this is what we want to find
- T: our final temperature is 44.0°C; to convert it to Kelvins, add 273.
44.0 + 273 = 317 K
Put this altogether:
Multiply both sides by (4.2 * 317):
≈ 4.5 L
However, the problem wants millilitres, so simply multiply 4.5 by 1000:
4.5 * 1000 = 4500
The answer is thus A.