The heat of combustion of carbon to $C O_{2}$ is -393.5 kJ/mol. The heat released upon formation of 35.2g of $C O_{2}$ from carbon and oxygen gas is

+315 kJ

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-630 kJ

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-3.15 kJ

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-315 kJ

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Solution

The correct option is A +315 kJ
$C_{(s)} + O_{2 (g)} \to C O_{2 (g)}, Δ H = - 393.5 k J / m o l$
$(m o l e c u l a r w e i g h t o f C O_{2} = 1 m o l e o f C O_{2} = 44 g)$
$\Rightarrow$ Amount of heat released in formation of $44 g C O_{2} = 393.5 k J$
$∴$ Amount of heat released on formation of $35.2 g C O_{2} = \frac{393.5}{44} \times 35.2 = 314.8 \approx 315 k J$

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Similar questions

Q. The heat of combustion of carbon to

C O_{2}

is -393.5 kJ/mol. The heat released upon formation of 35.2g of

C O_{2}

from carbon and oxygen gas is

Q. Enthalpy of combustion of carbon to

{C O}_{2}

is -393.5kJ per mol. Calculate the heat released upon formation of 35.2g of

{C O}_{2}

from carbon and dioxygen gas

Q. The heat of combustion of carbon to

{C O}_{2} (g)

- 393.5 k J {m o l}^{- 1}

. Calculate the heat released upon formation of

35.2 g

{C O}_{2} (g)

from carbon and oxygen gas.

Enthalpy of combustion of carbon to CO₂ is –393.5 kJ mol^–1. Calculate the heat released upon formation of 35.2 g of CO₂ from carbon and dioxygen gas.

Q. Enthalpy of combustion of carbon to

{C O}_{2}

- 393.5 k J {m o l}^{- 1}

. The heat released upon formation of

35.2 g

{C O}_{2}

from carbon and dioxygen gas is:

[Molar mass of

{C O}_{2} = 44 g {m o l}^{- 1}

]

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The heat of combustion of carbon to CO2 is -393.5 kJ/mol. The heat released upon formation of 35.2g of CO2 from carbon and oxygen gas is

The correct option is A +315 kJC(s)+O2(g)→CO2(g), ΔH=−393.5 kJ/mol(molecularweightofCO2=1moleofCO2=44g) ⇒ Amount of heat released in formation of 44g CO2=393.5kJ ∴ Amount of heat released on formation of 35.2g CO2=393.544×35.2=314.8≈315kJ

The heat of combustion of carbon to $C O_{2}$ is -393.5 kJ/mol. The heat released upon formation of 35.2g of $C O_{2}$ from carbon and oxygen gas is