Question

In the space station, liquid ammonia is used to transfer heat. If 100 g of liquid ammonia evaporates, then how much heat was removed? (ΔHv=5.65  kJ/mol)

Answer 1

Answer:

Methanol (CH3OH) has a heat of fusion of 3.16 kJ/mol. Which of the ... to transfer heat. If 100 g of liquid ammonia evaporates, then how much heat was removed? (ΔHv = 5.65 kJ ...

Answer 2

If 100 g of liquid ammonia evaporated, then the heat removed is 80.7143 KJ.

1. the heat removed will be equal to the heat absorbed by the liquid ammonia.

2.Since we are given that ΔHv =5.65 KJ/mol which means 1 mole of ammonia absorbs 5.65 KJ of heat.

3. Now moles of ammonia in 100g= 100/molecular mass of ammonia

                                                        = 100/17

                                                        =14.29 moles (approx)

4. Therefore heat absorbed by ammonia = moles* ΔHv per mole

                                                                    = 14.29*5.65

                                                                    =80.7143 KJ of heat (approx)