Which of the following DIRECTLY affects the RMS speed of molecules in a containe

Question

Which of the following DIRECTLY affects the RMS speed of molecules in a container. number of moles Pressure Volume molecular binding energy temperature How high of a mountain should you chmb to work off 4.2 kcal of food if you weight 100 kg? 4.0 m 4.2 m 4.3 m 9.8 m 18 m 2000 J of heat is added to a system, and 1800 J of work is done on the system. What is the change in internal energy of the system? 200 J minus200 J 3800 J 0J 1900 J How much work is done by the isovolumetric process shown below PV (P_BminusP_A) V (P_AminusP_B) V 0 None of the Above

Explanation / Answer

32)

Vrms = sqrt(3RT/M)

so option (E) is correct.

33)

work = 4.2 kcal = 4.2*4184 = 17572.8 J

mgh = 17572.8 J

h = 17572.8/(100*9.8) = 17.93 m = 18 m (answer)

34)

U = Q + W

internal energy of the system = 2000 J + 1800 J = 3800 J

35)

work done = delta P * V

work done = (PA - PB) * V

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