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(C) Specific heat $s$ of a substance is defined as the amount of heat $Q$ required to raise the temperature of a unit mass $m$ of the substance by a u

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Infinity

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(C) Specific heat $s$ of a substance is defined as the amount of heat $Q$ required to raise the temperature of a unit mass $m$ of the substance by a unit degree $\Delta T$.The formula is given by $s = \frac{Q}{m \Delta T}$.During the process of boiling water changing into steam,the substance undergoes a phase change.In a phase change process,the temperature of the substance remains constant,meaning $\Delta T = 0$.Substituting this into the formula,we get $s = \frac{Q}{m 	imes 0} = \infty$.Therefore,the specific heat of boiling water during this phase change is infinite.

Boiling water is changing into steam. The specific heat of boiling water is

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