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Chemistry

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Daryl Kemmer

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Cards in this guide (6)
Which of the following shows that the combustion of methane produces 802 kJ mol of energy

CH4(g) + 2O2(g) CO2(g) + 2H2O(g) + 802 kJ/mol

What reactions would have a decrease in entropy

anabolic reaction

How much energy is required to raise the temperature of 0.2 kg of aluminum from 15C to 18C

538 J

If 213 J raises a sample of water 8.2 C what is the mass of the water

6.2 g

How can an unknown H reaction be determined using Hess law

To use Hess Law, one simply uses the known equations and their respective ∆H values, rearranges them as necessary to arrive at the target equation (unknown ∆H) and then adds the ∆H values to obtain the value for the target equation. This is possible because Hess Law applies to state functions which are independent of the path.

What is an example that shows that the combustion of methane produces 802 kJmol of energy

The enthalpy of combustion is determined by calorimetry.

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