physics question?

👨🏻‍🏫 學術台物理學

[匿名]

2016-02-29 6:37 pm

更新1:

A Goodyear blimp typically contains 5400 m3 of helium (He) at an absolute pressure of 1.1 105 Pa. The temperature of the helium is 280 K. What is the mass (in kg) of the helium in the blimp?

回答 (2)

賣女孩的火柴

2016-02-29 6:46 pm

Volume, V = 5400 m³
Pressure, P = 1.1 × 10⁵ Pa
Absolute temperature, T = 280 K
Gas constant, R = 8.314 J/(mol K)
No. of moles, n = ? mol

PV = nRT
n = PV/(RT) = (1.1 × 10⁵) × 5400 / (8.314 × 280) mol

Molar mass of He = 0.004003 kg/mol
Mass of He = [(1.1 × 10⁵) × 5400 / (8.314 × 280)] × 0.004003 = 1020 kg

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[匿名]

2016-02-29 6:55 pm

yes good question

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