Practice explaining heat flow
examine the image showing a pan of boiling
eggs on a gas burner. what is the path of heat
flow?

a) hot gas - pan -> eggs - water
b) pan -> hot gas - eggs > water
c) burning gas - pan -* water - eggs
d) eggs — water - burner - pan
e) pan - water - eggs - burner
dona

The right choice is "burning gas → pan → water → eggs"

Explanation:

Heat will flow from the body of higher temperature to the cooler body.

So, heat will firstly flow from burning gas to pan by conduction then to the water in contact with pan then to the egg present inside the water.

So, the right choice is :

"burning gas → pan → water → eggs"

the equation that correctly represent the reaction for formation of ammonia is

n2+ 3h2 → 2nh3 (answer d)

1 mole of nitrogen gas (n2) react with 3 moles of hydrogen gas (h2) to form 2 moles of ammonia ( nh3). this is in a process known as haber process were iron is used as a catalyst and reaction take place that a higher temperature and pressure. the process is exothermic hence energy is released.

i'm assuming that the correct answer is indeed the first one/ "a"..