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kolbaska11 [484]
3 years ago
8

What is thermal energy?

Chemistry
1 answer:
Svetllana [295]3 years ago
4 0

Answer:

The kinetic energy of particles in a system.

Explanation:

Thermal energy in heat and have kinetic energy!

Hope it helps!!

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In stoichiometric calculations, which quantity MUST be used to convert from one chemical substance to another?
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A 118-ml flask is evacuated and found to have a mass of 97.129 g. when the flask is filled with 768 torr of helium gas at 35 ?c,
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The full question asks to decide whether the gas was a specific gas. That part is missing in your question. You need to decide whether the gas in the flask is pure helium.

To decide it you can find the molar mass of the gas in the flask, using the ideal gas equation pV = nRT, and then compare with the molar mass of the He.

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n = 1.015 atm * 0.118 liter / [ 0.082 atm*liter/K*mol  * 308.15K] =0.00472 mol

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=> MM =  mass/n = 0.042 / 0.00472 = 8.90 g/mol

Now from a periodic table or a table you get that the molar mass of He is 4g/mol

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The heat lost by the metal should be equal to the heat gained by the water. We know that the heat capacity of water is simply 4.186 J / g °C. Therefore:

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3 years ago
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