方均根速率 vrms = (3RT/μ)^(1/2)
式中μ表示摩尔质量
根据 pV = (M/μ)RT ,得 RT/μ = pV/M
得 p = (vrms)^2 M / (3V)
= 200^2*0.1/(3*0.1)
= 13333.3 Pa