An aluminum rod 0.500 m in length and with a cross-sectional area of 2.00 cm 2 i

Question

An aluminum rod 0.500 m in length and with a cross-sectional area of 2.00 cm2 is inserted into a thermally insulated vessel containing liquid helium at 4.20 K. The rod is initially at 330 K. (Aluminum has thermal conductivity of 3 100 W/m

An aluminum rod 0.500 m in length and with a cross-sectional area of 2.00 cm2 is inserted into a thermally insulated vessel containing liquid helium at 4.20 K. The rod is initially at 330 K. (Aluminum has thermal conductivity of 3 100 W/m middot K at 4.20 K; ignore its temperature variation. Aluminum has a specific heat of 0.215 cal/g·degree C and density of 2.70 g/cm3. The density of liquid helium is 0.125 g/cm3.) If one-half of the rod is inserted into the helium, how many liters of helium boil off by the time the inserted half cools to 4.20 K? Assume the upper half does not yet cool. Your response differs from the correct answer by more than 10%. Double check your calculations. liters If the circular surface of the upper end of the rod is maintained at 330 K, what is the approximate boil-off rate of liquid helium after the lower half has reached 4.20 K? Your response differs from the correct answer by more than 10%. Double check your calculations. liters/s

Explanation / Answer

a)11.4 ltr

b)0.3092 lt/s

Related Questions

Navigate

• Browse (All)
• Browse A
• Subjects

---

---

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