A balloonist begins a trip in a helium-filled balloon in early morning when the
Chapter 6, Problem 6.86(choose chapter or problem)
A balloonist begins a trip in a helium-filled balloon in early morning when the temperature is 158C. By mid-afternoon, the temperature is 30.8C. Assuming the pressure remains at 1.00 atm, for each mole of helium, calculate the following: (a) The initial and final volumes (b) The change in internal energy, DE (Hint: Helium behaves like an ideal gas, so E 5 3 2 nRT. Be sure the units of R are consistent with those of E.) (c) The work (w) done by the helium (in J) (d) The heat (q) transferred (in J) (e) DH for the process (in J) (f) Explain the relationship between the answers to parts (d) and (e).
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