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4 years ago

8

Hydrological power harnesses energy through the movement of water in rivers. Which statement represents an added benefit to this

renewable energy resource? A) costly to build B) creates water reserves C) tracks movement of water D) releases greenhouse gases

2 answers:

tekilochka [14]4 years ago

5 0

D) releases greenhouse gasses

natali 33 [55]4 years ago

4 0

Answer:

B) creates water reserves

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Calculate the enthalpy change for the thermite reaction: 2Al(s)+Fe2O3(s)→2Fe(s)+Al2O3(s), ΔH∘rxn=−850 kJ when 12.0 mol of Al und

djverab [1.8K]

<u>Answer:</u> The enthalpy of the reaction for given amount of aluminium will be $-51.0\times 10^2kJ$

<u>Explanation:</u>

We are given:

Moles of aluminium = 12 moles

For the given chemical reaction:

$2Al(s)+Fe_2O_3(s)\rightarrow 2Fe(s)+Al_2O_3(s);\Delta H^o_{rxn}=-850kJ$

By Stoichiometry of the reaction:

If 2 moles of aluminium produces -850 kJ of energy.

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Converting this into three significant figures, we get:

$\Rightarrow -5100kJ=-51.0\times 10^{2}kJ$

Thus, the enthalpy of the reaction for given amount of aluminium will be $-51.0\times 10^2kJ$

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