Athermal machine: a. use the positive work in the system to transfer it as heat to a low temperature reserve to another high temperature reserve
b. convert work into an equivalent amount of heat
c. convert heat input into an equivalent amount of work
d. take heat of entry, perform work and lose energy as heat

d.Take heat of entry, perform work and lose energy as heat

Explanation:

A thermal machine is a machine which take heat as input and perform some work then reject some heat .

A heat engine is a thermal machine which take heat from high temperature reservoir and rejecting the heat to the low temperature reservoir while performing some positive work.High temperature reservoir is known as source and the low temperature reservoir is known as sink.

So the option d is correct.

d.Take heat of entry, perform work and lose energy as heat

  the grams     of oxygen gas   that can be produced     is 20.6   grams of o₂

calculation

2liclo₃ →   2 licl + 3 o₂

step 1:   find the moles of liclo₃

moles = mass÷ molar mass

from periodic table the molar mass of liclo₃ =6.9 +35.5   +(16 x3) =90.4 g/mol

moles=38.7 g÷90.4 g/mol=0.4281   moles

step 2:   use the   mole ratio   to calculate the moles of o2

from equation above, liclo₃: o₂   is 2: 3  

therefore the moles of   o₂=0.4281 moles x3/2 =0.6422   moles

step 3: find mass   of o₂

mass= moles x molar mass

from periodic table the   molar mass of   o₂ = 16 x2= 32 g/mol

mass=0.6422   moles   x   32 g/mol = 20.6 grams of o₂