13. Propane's melting point is -188 °C. It's boiling point is -42 °C. A 200 g sample of propane at -80 °C is warmed to 0 °C. The specific heat of propane gas is 1.68 J/gC. The
specific heat of liquid propane is 2.11 J/gC.
a. Draw a full heating/cooling curve and clearly darken the region this represents.
Label the key temperatures, the states of matter, the types of energy in each
region.
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b. Draw an energy bar diagram for this situation. (2 points) -
Calculate the total energy for the process. (5 points) -3
2.1/d. Is the process endothermic or exothermic? Explain why. (2 points)Vaz
C.

Will give imagine you are given a mystery element. it is, however, a discovered and known element. you may perform a maximum of two observations or tests to determine its identity. time and money is critical, so you need to prioritize your tests. if you can get by with a single test, you get 100 super-geek points from your research lab team. pick your two tests, number them as #1 and #2, and justify why you think these two will certainly be enough (and why the first might well be enough all by itself.) the available tests are classification into metal, non-metal, or metalloid, count of valence electrons, count of electron shells, atomic radius (error range: +/- 1 pm), electronegativity (error range: +/- 0.1), first ionization energy (error range: +/- 10 kj/mole), melting point (error range: +/- 10 c), and boiling point (error range: +/- 20 c).