Can the temperature of a system remain constant even when it is heated? Explain.

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(N/A) Yes,it is possible for the temperature of a system to remain constant while it is being heated.
According to the first law of thermodynamics,$dQ = dU + dW$.
If the heat supplied $(dQ)$ is entirely used to perform work $(dW)$ against the surroundings,then the change in internal energy $(dU)$ will be zero.
Since internal energy is a function of temperature $(U \propto T)$,if $dU = 0$,then the change in temperature $(dT)$ is also zero.
This occurs during an isothermal process,such as the melting of ice at $0^{\circ}C$ or the boiling of water at $100^{\circ}C$ under constant pressure.

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