Question

Two moles of helium are initially at a temperature of 28.0 ° C and occupy a volume of 2.70x10-2 m3 The helium first expands at constant pressure until ts volume has doubled. Then it expands adiabatically until the temperature returns to its initial value. Assume that the helium can be treated as an ideal gas. What is the total work done by the helium? W-1.25x104 J Previous Answers Correct Part D What is the final volume of the helium? 10.172 Submit Previous Answers Request Answer X Incorrect Try Again; 2 attempts remaining

Answer 1

d)The final volume is T_2 V_2^gamma - 1 = T_3 V_3^gamma - 1 2 T_1/- v_2^gamma - 1 = t_1 v_3^gamma - 1 v_3^gamma - 1 = 2 v_2^gamma - 1 v_3 = (1/2 gamma - 1) v_2 v_3 = 2^3/2 times 5.4 times 10^- 2 = 0.15273 m^3 gamma = 5/3 gamma - 1 = 5/3 - 1 gamma - 1 = 2/3 1/r - 1 = 3/2