Question

Water is flowing in a pipe with a mass flow rate of 100.0 lb/h (M water H,O=18.016). What is the (i) Molar flow rate of H20 (gmol/s) (ii) Mass flow rate of O (Mw=16.00) in this stream (8 0/s)? (iii) Mass flow rate of H (Mw=1.00) in this stream (g H/s)?

Answer 1

i) 0,7 molH20/s

ii)11,2 g O/s

iii)1,4 g H/s

Step-by-step explanation:

i) To find the molar flow rate of water, we just convert the mass of water to moles of water using its molecular weight(g/mol) and changing to the proper units (lb to grames and hours to seconds):

`100 (lb)/(h)*(453,5g)/(1 lb)*(1molH20)/(18,016g)*(1h)/(3600s)=0,7(molH20)/(s)`

ii) Now we just consider the oxygen in the water stream (for 1 mole of water there is 1 mole of oxygen):

`100(lb)/(h) *(453,5g)/(1lb)*(1 molH20)/(18,016g)*(1molO)/(1molH20)*(16gr)/(1molO)*(1h)/(3600s)=11,2(gO)/(s)`

iii)Just considering the hydrogen in the stream (for 1 mole of water there is 2 moles of hydrogen):

`100(lb)/(h) *(453,5g)/(1lb)*(1 molH20)/(18,016g)*(2molH)/(1molH20)*(1gr)/(1molH)*(1h)/(3600s)=1,4(gH)/(s)`