(b) Find the energy added to it by neat. kJ (c) Find the change in its internal
ID: 1425045 • Letter: #
Question
(b) Find the energy added to it by neat. kJ (c) Find the change in its internal energy. kJ A 3.00-mol sample of helium gas initially at 300 K, and 0.400 atm is compressed isothermally to 1.40 atm. Note that the helium behaves as an ideal gas. (a) Find the final volume of the gas. m^3 (b) Find the work done on the gas. kJ (c) Find the energy transferred by heat. kJ A 2.00-mol sample of a diatomic ideal gas expands slowly and adiabatically from a pressure of 4.92 atm and a volume of 11.8 L to a final volume of 29.6 L. (a) What is the final pressure of the gas? atm (b) What are the initial and final temperatures? intial K final K (c) Find Q for the gas during this process. kJ (d) Find DeltaE_int for the gas during this process. kJ (e) Find W for the gas during this process. kJExplanation / Answer
only 1 question at a time pelase
9.
a)
V1 = n*R*T/P1
= 3*0.0821*300/0.400
= 184.725 L
= 0.184725 m^3
T is constant
So,
P1*V1 = P2*V2
0.400* 0.184725 = 1.4*V2
V2 = 0.0528 m^3
Answer: 0.0528 m^3
b)
W= - n*R*T*ln *(V2/V1)
= -3*8.314*300*ln (0.0528/0.184725)
= 9370.9 J
Answer: 9370.9 J
c)
since T is contant,
delta U = 0
delta U = Q+W
0 = Q + 9370.9 J
Q = - 9370.9 J
Answer: - 9370.9 J
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