Question

For the expansion in the figure below, if the internal energy of the system decreases by 3,800 J, what is the heat added to the system?

iPad令 5:58 PM 15 points GioCP2 16.P015. My N For the expansion in the figure below, if the internal energy of the system decreases by 3,800 J, what is the heat added to the system? 4×105 ì 3x10s 2×10s 1 x 10 .01 0.02 V (m3) Estimate the coordinates of i Vi m3 Pi= Pa Estimate the coordinates of f m3 Pa Calculate the heat added to the system. (Use your estimates.) Need Help? Read It Talk to & Tutor

Answer 1

The coordinate of initial and final point are approximately

$P_i=3.5\times10^5$ Pa$; V_i=0.006$ m$^3\\ P_f=3.5\times10^5$ Pa$; V_f=0.022$ m$^3\\$

Hence work done will be (Isobaric process)

$\Delta W=P\Delta V=3.5\times10^5\times(0.022-0.006)=5600$ J$$

Given that

$\Delta U=-3800$ J$$

Hence Heat added will be

$\Delta Q=\Delta U+\Delta W=-3800+5600=1800$ J$$