A sample of helium gas is in a sealed rigid container. What occurs as the temperature of the sample is increased

Chemistry

1 answer:

hammer [34]4 years ago

3 0

The electrons will move more rapidly resulting in a higher pressure even at a consistent volume

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The increase in atomic radius as you go down the periodic table is caused by?

Kryger [21]

Answer: The number of energy levels increases as you move down a group as the number of electrons increases. Each subsequent energy level is further from the nucleus than the last. Therefore, the atomic radius increases as the group and energy levels increase.

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Determine the enthalpy change for the decomposition of calcium carbonate. CaCO3 (s) --> CaO (s) + CO2 (g) given the thermoche

Gnesinka [82]

Answer : The enthalpy change for the decomposition of calcium carbonate is, 178.1 kJ/mol

Explanation :

According to Hess’s law of constant heat summation, the heat absorbed or evolved in a given chemical equation is the same whether the process occurs in one step or several steps.

According to this law, the chemical equation can be treated as ordinary algebraic expression and can be added or subtracted to yield the required equation. That means the enthalpy change of the overall reaction is the sum of the enthalpy changes of the intermediate reactions.

The given main reaction is,

$CaCO_3(s)\rightarrow CaO(s)+CO_2(g)$ $\Delta H=?$