The temperature of the balloon is increased to 38.0°C as it expands to a volume of 570. L, the pressure remaining constant. Calculate q, w, and E for the helium in the balloon. (The molar heat capacity for helium gas is 20.8 J/°C·mol.)
2007-11-25 04:33:28 · 2 answers · asked by Anonymous in Science & Mathematics ➔ Chemistry
Fist Law: DeltaE = q + w
At constant P, w = - P DeltaV; this is work done expanding, and negative because it is done BY, not ON, the system
q = heat supplied = change in temp x molar specific heat x no. of moles
[Advanced aside: the value of specific heat you are using is the specific heat at constant pressure. If the gas had been held to constant volume, less heat would have been needed]
2007-11-25 06:48:05 · answer #1 · answered by Facts Matter 7 · 0⤊ 0⤋
If the cylinder you're speaking about is a CL length. And it truly is filled to 1850kpa... nicely with a CL cylinder filled to 2000kpa you should take care of to fill 50 x eleven inch balloons. So in short i imagine you should take care of to fill round 40 5 x eleven inch balloons.... desire this facilitates
2016-10-25 01:24:13 · answer #2 · answered by grainger 4 · 0⤊ 0⤋