Question

#1

Classify each of the following processes as exothermic or endothermic. 1. The dissolution of NaOH in water causes the water to become warm. 2.When an instant ice pack is activated, it becomes cold to the touch. 3.In the combustion of propane, a bright flame is produced 4.2H2(g) + O2(g) → 2H2O(g) + 483 kJ/mol

#2

#3

Answer 1

#1: ® The dissolution of Naon in water causes the water to leecome warm. (EXOTHERmie) ② when cold an to instant ice pack is activated, it becomes the touch. CENDOTHER mie) ③ a bright flame is In the comleustion of propane, produced. (EXOTHERmie) 24 + →950 DH = - 483 kJ. (EXOTHERMIC) mole

{{3: mol of c.н., № 4. С. 3 . 10 б. 14 • 25. 1 2 enedy se posed : 20) 10.159 - 12, 54 59 E1 }} 3: Код 2 chape е си, = 9.4 2021 hoo - 13325Je JG 133 Зоо = 5. 15ҳ looox 4. 144 x ДТ ОТ (°C) = 5.49 °C