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mixer [17]
3 years ago
5

What is one result of a chemical change?

Chemistry
2 answers:
nikklg [1K]3 years ago
8 0
B. A new material is formed.
WINSTONCH [101]3 years ago
4 0
B.<span>A new material is formed.</span>
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The equation to show the the correct form to show the standard molar enthalpy of formation:

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Explanation:

The standard enthalpy of formation or standard heat of formation of a compound is the change of enthalpy during the formation of 1 mole of the substance from its constituent elements, with all substances in their standard states.

Given, that 1 mole of H_2 gas and 1 mole of Br_2 liquid gives 2 moles of HBr gas as a product.The reaction releases 72.58 kJ of heat.

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Divide the equation by 2.

\frac{1}{2}H_2(g) +\frac{1}{2}Br_2(l)\rightarrow HBr(g) ,\Delta H_{f}^o= -36.29 kJ

The equation to show the the correct form to show the standard molar enthalpy of formation:

\frac{1}{2}H_2(g) +\frac{1}{2}Br_2(l)\rightarrow HBr(g) ,\Delta H_{f}^o= -36.29 kJ

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