Engineering Thermodynamics
An adiabatic wall is one which

Prevents thermal interaction
Discourages thermal interaction
Permits thermal interaction
Encourages thermal interaction

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Engineering Thermodynamics
According to Dalton's law, the total pressure of the mixture of gases is equal to

Greater of the partial pressures of all
Sum of the partial pressures of all divided by average molecular weight
Average of the partial pressures of all
Sum of the partial pressures of all

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