https:/session.masteringchemistry.com/myct/itemView?assignmentProblemID-55743921

Question

https:/session.masteringchemistry.com/myct/itemView?assignmentProblemID-55743921 CHEM1314 CHEM1314F 15 Ant Exercise 6.53 Signed in as Raegan Chambers Help Clos e previous 7 of 35 next Exercise 6.53 Part A The air within a piston equipped with a cylinder absorbs 575 J of heat and expands from an initial volume of 0.12 L to a final volume of 0 87 L against an external pressure of 1.0 atm What is the change in internal energy of the air within the piston? AE Incorrect; Try Again; 4 attempts remaining Continue re 16 23

Explanation / Answer

q = +575 J

Vi = 0.12 L

Vf = 0.87 L

P = 1 atm

a) Change of Internal energy

Q-W = dU

W = P*(Vf-Vi) = 1atm*(0.87-0.12)L = 0.75 atm*L

W = 0.75atm*L * (101325 Pa/atm) * (1 m3/1000L = 76 J

Q-W = dU

Since work is done against surroundings, you are doing work outside!

575-76 = DU

U = 499 J

Related Questions

Navigate

• Browse (All)
• Browse H
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.