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Five moles of helium are mixed with two ...

Five moles of helium are mixed with two moles of hydrogen to form a mixture. Take molar mass of helium `M_(1) = 4g` and that of hydrogen `M_(2) = 2g`
If the internal energy of He sample is `1000J` and that of the hydrogen sample is `200J` , then the internal energy of the mixture is

A

`900J`

B

`128.5J`

C

`171.4J`

D

`300J`

Text Solution

Verified by Experts

The correct Answer is:
D
Internal energy `" "` `He = 100J`
Internal energy `" "` ` H = 200J`
while mixing, they don't interact Internal energy of mix `(100+200)J = 300J`
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