A reaction occurs in a vessel such that its mass does not change but its temperature is increased, then the system is which of the following?(a) Steady-state(b) Unsteady-state(c) Cannot say(d) None of the mentionedThis question was posed to me in quiz.The origin of the question is Steady-State and Unsteady-State Systems in section Introduction to Material Balances of Basic Chemical Engineering

A reaction occurs in a vessel such that its mass does not change but i

1.	A reaction occurs in a vessel such that its mass does not change but its temperature is increased, then the system is which of the following?(a) Steady-state(b) Unsteady-state(c) Cannot say(d) None of the mentionedThis question was posed to me in quiz.The origin of the question is Steady-State and Unsteady-State Systems in section Introduction to Material Balances of Basic Chemical Engineering
Answer» The correct ANSWER is (b) Unsteady-state To explain I would say: For a steady-state system all the PROPERTIES temperature, pressure, mass should REMAIN CONSTANT with respect to time, so it is an unsteady-state process.

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