Hw Secure https://session 78596782&offset; next Problem 19.66 Part A A thermally

Question

Hw Secure https://session 78596782&offset; next Problem 19.66 Part A A thermally insulated 2.50-L flask contains monatomic xenon gas at an initial temperature of 50.0 C and pressure of 2.50 atm. You now add enough energy to double the thermal energy of the gas. The mass of a xenon atom is 2.18 x 10 How many atoms does the flask contain? N 141 10 atom Em Mr Answers Give Up Submit Correct Part B How much energy did you add to the flask? Express your answer with the appropriate units E 947 J All attempts used; correct answer displayed Part C By what factor did you change the root-mean-square speed of the atoms? sros 1.41 Correct

Explanation / Answer

B) Change in internal energy = f/2 nR delta T

= 3/2 * (1.41 e23/6.02e23) *8.3* (273+50)

= 942 J answer

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