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Laabri

Hess's Law

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Last updated 4 months ago
7 Nsɛmmisa

As a class, we will be doing the first two questions together. Complete the rest yourself!

Remember if the standard heat of the reaction is negative, the reaction is exothermic.

Remember if the standard heat of the reaction is positive, the reaction is endothermic.

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Asemmisa {{asɛmmisaAhyɛnsode}}
1.

Calculate the standard heat of reaction for the complete combustion of ethanol, C2H5OH(l). Round to the nearest tenths. Put the numbers only.

C2H5OH(l)+3O2(g)→2CO2(g)+3H2O(g)

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Asemmisa {{asɛmmisaAhyɛnsode}}
2.

Round to the nearest tenths. Put the numbers only.

Asemmisa {{asɛmmisaAhyɛnsode}}
3.

Round to the nearest tenths. Put the numbers only.

Asemmisa {{asɛmmisaAhyɛnsode}}
4.

Round to the nearest tenths. Put the numbers only.

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Asemmisa {{asɛmmisaAhyɛnsode}}
5.

Use the standard enthalpies of formation to determine the change in enthalpy for each of these reactions. Round to the nearest whole number. Put the number only

NaOH(s) +HCl(g) --> NaCl(s) + H2O(g)

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Asemmisa {{asɛmmisaAhyɛnsode}}
6.

Use the standard enthalpies of formation to determine the change in enthalpy for each of these reactions. Round to the nearest tenths. Put the number only.

CH4(g) +2O2(g) --> CO2(g) +2H2O(l)

1
Asemmisa {{asɛmmisaAhyɛnsode}}
7.

Use the standard enthalpies of formation to determine the change in enthalpy for each of these reactions. Round to the nearest tenths. Put the number only

2H2S (g) + 3O2(g) -->2H2O (l) + 2SO2(g)