Question

On a p-v plane for a pure substance in superheated region, the slopes of constant temperature lines are positive negative zero infinite

Answer 1

Thank you for getting in touch with us for the answer of your query. As per your query, the temperature lines are constant and when temperature lines are constant their slopes will be negative for the process. However, it can never be positive as for the positive, pressure and volume needs to be raised simultaneously, so it is not possible. But, for other processes they could be zero or infinite.