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Gold (Au, M = 197 .0 g mol-1) melts at 1338 K with a heat of...

Gold (Au, M = 197 .0 g mol-1) melts at 1338 K with a heat of fusion of 12. 7 kJ mol-1, and boils at 3080 K with a heat of vaporization of 310 kJ mol-1. The specific heats (in units J g-1 K-1) are: Au(s) - 0.131, Au(l) - 0.149, Au(g) - 0.0632. Calculate the heat needed to convert 2.15 g of solid gold at 1000 K to liquid at 1500 K.

  • .

    286 J

  • B.

    12.8 kJ

  • C.

    81.1 J

  • D.

    160 J

  • E. none of these

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