Question

In a given process for an ideal gas, dW = 0 and dQ < 0. Then for the gas ____________.

Options

• The temperature will decrease

• The volume will increase

• The pressure will remain constant

• The temperature will increase

Answer 1

In a given process for an ideal gas, dW = 0 and dQ < 0. Then for the gas The temperature will decrease.

Explanation:

From 1^st law of thermodynamics,

`"dU" = "dQ" - "dW"`

`Rightarrow "dU" = "dQ"  (< 0)      (because "dW" = 0)`

`Rightarrow "dU" < 0`

So temperature will decrease.