Physics: Calculate the heat energy released when 13.3 g of liquid mercury at 25.00 c is converted to solid mercury at its melting point.constants for mercury at 1 atmheat capacity of hg(l) 28.0 j/(mol k)melting point 234.32 kenthalphy of fusion 2.29 kj/mol

Calculate the heat energy released when 13.3 g - id1334634498, reecedstceklein

Ответ:

Jasminehenry123

15.01.2022

Physics

$-270.321012\ J$

Explanation:

C_v = Heat capacity of Hg = 28 J/mol

$\Delta T$ = Change in temperature = (234.32-(273.15+25))

$\Delta H_{f}$ = Enthalpy of fusion = 2.29 kJ/mol

The number of moles is given by

$n=13.3\times \dfrac{1}{200.59}\\\Rightarrow n=0.0663\ molHg$

Heat is given by

$Q_1=nC_v\Delta T\\\Rightarrow Q_1=0.0663\times 28\times (234.32-(273.15+25))\\\Rightarrow Q_1=-118.494012\ J$

Heat released is given by

$Q_2=-n\Delta H_{f}\\\Rightarrow Q_2=-0.0663\times 2.29\times 10^3\\\Rightarrow Q_2=-151.827\ J$

Total heat is given by

$Q=Q_1+Q_2\\\Rightarrow Q=-118.494012+(-151.827)\\\Rightarrow Q=-270.321012\ J$

The total heat released is $-270.321012\ J$

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Ответ:

bullockarwen

12.03.2023

Physics

Stars are made of very hot gas. This gas is mostly hydrogen and helium, which are the two lightest elements. Stars shine by burning hydrogen into helium in their cores, and later in their lives create heavier elements.

Explanation:

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Calculate the heat energy released when 13.3 g of liquid mercury at 25.00 c is converted to solid mercury at its melting point.constants for mercury at 1 atmheat capacity of hg(l) 28.0 j/(mol k)melting point 234.32 kenthalphy of fusion 2.29 kj/mol

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