SATHEE: Chemical Thermodynamics Question 198

Chemical Thermodynamics Question 198

Question: The heat of combustion of carbon is -94 kcal at 1 atm pressure. The intrinsic energy of $C O_{2}$ is

Options:

A) $+ 94, k c a l$

B) $-, 94, k c a l$

C) $+ 47, k c a l$

D) $- 47, k c a l$

Show Answer

Answer:

Correct Answer: B

Solution:

$C_{(S)} + O_{2} (g) \to C O_{2} (g)$ , $Δ n_{g} = 1 - 1 = 0$

$∴ Δ E = Δ H = - 94 k c a l$

$Δ E = E_{C O_{2}} - (E_{C} + E_{O_{2}})$

$= E_{C O_{2}} - (0 + 0)$ or $E_{C O_{2}} = Δ E = - 94 k c a l .$

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Chemical Thermodynamics Question 198

Question: The heat of combustion of carbon is -94 kcal at 1 atm pressure. The intrinsic energy of CO2 is

Options:

Answer:

Solution:

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Question: The heat of combustion of carbon is -94 kcal at 1 atm pressure. The intrinsic energy of $C O_{2}$ is