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1 year ago

What is the enthalpy of reaction for the

Chemistry

2 answers:

slamgirl [31]1 year ago

5 0

Answer:

656.3 kJ

endothermic

nexus9112 [7]1 year ago

3 0

Answer:

$\boxed{\text{656.3 kJ/mol}}$

Explanation:

The formula for calculating the enthalpy change of a reaction by using the enthalpies of formation of reactants and products is:

$\Delta_{\text{r}}H^{\circ} = \sum \Delta_{\text{f}} H^{\circ} (\text{products}) - \sum\Delta_{\text{f}}H^{\circ} (\text{reactants})$

CaCO₃(s) ⟶ CaO(s) + CO₂(g)

ΔH°f/kJ·mol⁻¹: -1207.1 -157.3 -393.5

$\begin{array}{rcl}\Delta_{\text{r}}H^{\circ} & = & [-157.3 + (-393.5)] - (-1207.1)\\& = & -550.8 +1207.1\\& = & \textbf{656.3 kJ/mol}\\\end{array}\\\\\text{The enthalpy of decomposition is } \boxed{\textbf{656.3 kJ/mol}}$

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1 year ago

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Dafna11 [192]

Answer:

$E_{red}^{0}$ for X is -1.20 V

Explanation:

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2 years ago

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It seems that you have missed the necessary options for us to answer this question, but anyway, here is the answer. At STP graphite and diamond are two solid forms of carbon, the statement that explains why these two forms of carbon differ in hardness is this: Graphite and diamond have different molecular structures. Hope this helps.

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1 year ago

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IrinaVladis [17]

Answer:

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Explanation:

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