A Sheet of metal weighing 750 g absorbs 15,650 J of energy when its temperature increases from 25°C to 250°C what is the specific heat of the metal

Explanation:

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In this case, when doing calorimetry problems, we need to use the following equation:

Whereas Q is the involved heat, m the mass, C the specific heat and T2 and T1 the final and initial temperatures respectively. Thus, since we need the specific heat, we proceed as follows:

Thus, we plug in to obtain:

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a). in this case, dh> 0 and sd> 0. if t becomes larger, the term "-tds" will become more negative. at some point, it is possible that -dts will be more negative than the dh is positive, and the reaction will become spontaneous. this is probably the correct answer, but you should look at all of the other possibilities and make sure of that.