Consider a balloon filled with helium at the following conditions. 313 g he 1.00 atm 1910. l molar heat capacity = 20.8 j/degree c middot mol the temperature of this balloon is decreased by 41.6 degree c as the volume decreases to 1643 l with the pressure remaining constant. determine q, w, and delta e (in kj) for the compression of the balloon.

Answer : The value of q, w and ΔE in kilojoule are -67.7 kJ, 27.05 kJ and -40.65 kJ respectively.

Explanation :

Formula used :

where,

Q = heat at constant pressure = ?  

= change in enthalpy energy

n = number of moles of helium gas = 78.25 mol

Molar mass of He = 4 g/mole

= heat capacity at constant pressure =

= change in temperature =

Now put all the given values in the above formula, we get:

Now we have to calculate the work done.

Formula used :

where,

w = work done

p = pressure of the gas = 1 atm

= initial volume = 1910 L

= final volume = 1643 L

Now put all the given values in the above formula, we get:

conversion used : (1 L.atm = 101.3 J)

Now we  have to calculate the value of of the gas.

Therefore, the value of of the gas is -40.65 kJ.

hurricanes form when warm, moist air from the ocean surface quickly rises into the atmosphere and forms storm clouds and rain. when the clouds are formed, heat is released which warms the cool air in the upper regions of the atmosphere so that the cycle can continue. which two phases of the water cycle are repeated in this process?