Gas Mixtures

Chemistry Level 1

2 moles of He mixes with 2 g of Hydrogen at NTP. What is the specific heat capacity of the mixture at the constant pressure ( C p ) . (C_p).

11 6 R \frac{11}{6}R 15 6 R \frac{15}{6}R 17 6 R \frac{17}{6}R 19 6 R \frac{19}{6}R

Ajit Sharma by Ajit Sharma , 31, India

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1 solution

Ajit Sharma
May 12, 2015

He is a monoatomic gass and Hydrogen is a diatomic gas. For monoatomic gas we Know that, Cp = 5R/2 For diatomic gas we know that, Cp = 7R/2

Moles of He (n1) = 2 Moles of Hydrogen (n2) = (weight / Molecular weight) = (2 / 2) = 1 (Cp) mixture = (n1Cp1 + n2Cp2) / (n1 + n2) = (2 5R/2 + 1 7R/2) / (2 + 1) = 17R/6

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