Fitting coefficients for C_p = a + bT + \frac{c}{T^2} in \frac{J}{mol K}

1 . Determine the change in enthalpy when the temperature of 21 moles of substance Ag(s) is changed from 566 K to 553 K . Your final answer must include units.

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2 . Determine the change in enthalpy when the temperature of 78 moles of substance BaO(s) is changed from 1247 K to 1406 K . Your final answer must include units.

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3 . Determine the change in enthalpy when the temperature of 22 moles of substance Fe(\alpha) is changed from 616 K to 727 K . Your final answer must include units.

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4 . Determine the change in enthalpy when the temperature of 58 moles of substance O_2(g) is changed from 842 K to 2287 K . Your final answer must include units.

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21.3 | 8.54 | 1.51 | |

53.3 | 4.35 | -8.3 | |

37.12 | 6.17 | 0 | |

29.96 | 4.18 | -1.67 |

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You can earn partial credit on this problem.