½h2(g) + ½i2(g) → hi(g), δh = +6.2 kcal/mole 21.0 kcal/mole + c(s) + 2s(s) → cs2(l) the temperature of the surroundings will: increase or decrease
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Ответ:
½H2(g) + ½I2(g) → HI(g), ΔH = +6.2
This reaction has an positive entalpy, meaning heat flows from the surroundings into the system, thus decreasing surrounding temperature.
Ответ:
Sn to HF ratio is 1:2 so divide the 2 mol of HF by 2 to get 1 mol of Sn.