E MasteringPhysics: Ch 17 & 18 gle Chrome https://session masteringphysics.com/m
ID: 1591937 • Letter: E
Question
E MasteringPhysics: Ch 17 & 18 gle Chrome https://session masteringphysics.com/myct/itemView?assignmentProblemlD D*57968423 PHYS040B(020) General Physics, Winter 2016 (Tsai) signed in as Kurt Tomongin l Hep I Close Ch 18 HW Proble 18.58 Resources v previous l 8 of 10 l next Problem 18.58 Part A The ms speed of the molecules in 2.0 g of hydrogen gas is 1600 m/s What is the total translational kinetic energy of the gas molecules? Express your answer to two significant figures and include the appropriate units €total 2.6 kJ My Answers Give Up Correct Part B What is the thermal energy of the gas? Express your answer to two significant figures and include the appropriate units 4.3 kJ My Answers Give Up Correct Part C 500 J of work are done to compress the gas while, in the same process, 1600 J of heat energy are transferred from the gas to the environment. Afterward, what is the ms speed of the molecules? Express your answer to two significant figures and include the appropriate units. In Submit My Answers Give Up Incorrect, Try Again; 9 attempts remaining Provide Feedback Conti 2:31 PM O Ask me anything PSI Pr 2/10/2016Explanation / Answer
Since you have got part (A) and (B) correct, I'm solving here part (C) only.
(C) Final thermal energy of the system
Ef = Eth + work done on the gas - heat transferred to the environment
Ef = 4300 + 500 - 1600 = 3200 J
Also Hydrogen is a diatomic gas with 3 translational 2 rotational degrees of freedom, so the final thermal energy can also be written as
Ef = (5/3) (1/2) mv2
3200 = (5/3) (1/2) (0.002) v2
v = 1385.64 m/s
Related Questions
Navigate
Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.