9.17 - Key: 17. Determine the increase in temperature of...

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Key: 17. Determine the increase in temperature of 1.0 L of water if the heat from the complete combustion of 6 g of the alkane called ethane (which has 2 carbons) is used to heat the water. (Use 4 J/ g-K for the specific heat of water) Δ H (delta H) = -1550 kJ/ mol C 2 H 6 a. 0.25 ˚C b. 0.47 ˚C c. 2.2 ˚C d. 75 ˚C e. None of the above This is a specific heat problem because you are using energy to heat water. In this type of problem, depending on what you are given, you can use the specific heat of water to solve for either the energy applied to the water (J), the amount of water that was heated (g), or the change in temperature (K or ˚C). Note that these are the units of specific heat. You can always use dimensional analysis to solve for one of these variables if you are given the others by paying attention to units, and canceling them out until your left with what you want. We are asked to solve for the change in temperature (K or ˚C). That means we must somehow know the remaining units from the specific heat of water, namely energy applied to the water (J), and the
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This document was uploaded on 11/04/2011 for the course CHEM 106 at BYU.

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9.17 - Key: 17. Determine the increase in temperature of...

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