Chapter 6: Problem 40
How are the standard enthalpies of an element and a compound determined?
Chapter 6: Problem 40
How are the standard enthalpies of an element and a compound determined?
All the tools & learning materials you need for study success - in one app.
Get started for freeWhat is the difference between specific heat and heat capacity? What are the units for these two quantities? Which is the intensive property and which is the extensive property?
Which of the following standard enthalpy of formation values is not zero at \(25^{\circ} \mathrm{C} ? \mathrm{Na}(s), \operatorname{Ne}(g)\) \(\mathrm{CH}_{4}(g), \mathrm{S}_{8}(s), \mathrm{Hg}(l), \mathrm{H}(g)\)
A 46-kg person drinks 500 g of milk, which has a "caloric" value of approximately \(3.0 \mathrm{~kJ} / \mathrm{g}\). If only 17 percent of the energy in milk is converted to mechanical work, how high (in meters) can the person climb based on this energy intake? [Hint: The work done in ascending is given by \(m g h,\) where \(m\) is the mass (in kilograms), \(g\) the gravitational acceleration \(\left(9.8 \mathrm{~m} / \mathrm{s}^{2}\right),\) and \(h\) the height (in meters).]
From a thermochemical point of view, explain why a carbon dioxide fire extinguisher or water should not be used on a magnesium fire.
The first step in the industrial recovery of zinc from the zinc sulfide ore is roasting, that is, the conversion of \(\mathrm{ZnS}\) to \(\mathrm{ZnO}\) by heating: $$\begin{array}{r}2 \mathrm{ZnS}(s)+3 \mathrm{O}_{2}(g) \longrightarrow 2 \mathrm{ZnO}(s)+2 \mathrm{SO}_{2}(g) \\ \Delta H=-879 \mathrm{~kJ} / \mathrm{mol}\end{array}$$ Calculate the heat evolved (in kJ) per gram of ZnS roasted.
What do you think about this solution?
We value your feedback to improve our textbook solutions.