Question

DULU Kcal . 35. Given: C3H8 + 5O2 -> 30 How many Kjoules of heat released SO2 -> 300, +420 Heat= -2500 Kjoules released if 3.00 moles of C3H8 is reacted with oxygen? A. -2500 Kj B. -5000 Kj C.-1250 000 Kj C.-1250 Kj D. - 7500 Kj E. - 500 Kj 36. Which one of the compounds A) LiBr B) CIO2 the compounds below is most likely to be ionic? C) SF2 D) H2S E) SiF4

Answer 1

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357 from the reaction, C3H8 +5027 3co, the H2o. which it balanced, Heat = -2500k Joules means that, 2500 kJ of heat is released out from this exothermic reaction. C₂ 48 (propane) is a fuel. from the balancing, it is observed that combustion of 1 mole of Catty whing Smoles oxygen (oz) yields 25ooks energy, af 1 mole of Cats Yeelds 2500ks, 3 moles will yreld (3x2500) = 7500k). of every. Since meat is released out, -ve lign is written with answer So answer is – 7500 kJ. Joption D., Other options do not match So they are wrong.