Irreversible head loss is the loss in head due to the effect of irreversibilities, like friction in piping, and it does not include the losses that occur within the pump or turbine. Mechanical energy loss is the loss of head due to irreversibilities such as friction in pump or turbine.
According to chegg.com
1 and 2 i think are 2 the rest are above me sorry
Answer:
Isomers are:
2-bromobutane (I)
2-bromo-2-methylpropane (II)
1-bromo-2-methylpropane (III)
1-bromobutane (IV)
for SN2 reaction :
IV > III > I > II
for E2 reaction is:
IV < III < I < II
Explanation:
The constitutional isomers are (structures are shown if figure):
2-bromobutane (I)
2-bromo-2-methylpropane (II)
1-bromo-2-methylpropane (III)
1-bromobutane (IV)
For SN2 reaction : the order of reactivity of alkyl halides is
tertiary < secondary < primary
For E2 reaction: the order of reactivity of alkyl halides is
tertiary > secondary > primary
Thus the order of reactivity for SN2 reaction is:
IV > III > I > II
The order of reactivity for E2 reaction is:
IV < III < I < II