For absolute chamber gas temperature Tg, absolute liquid temperature Tl, absolute wall temperature on the gas side of the wall Twg, overall film coefficient h, gas film coefficient hg and liquid film coefficient hl, determine the expression for heat transferred per unit area q.

For absolute chamber gas temperature Tg, absolute liquid temperature

1.	For absolute chamber gas temperature Tg, absolute liquid temperature Tl, absolute wall temperature on the gas side of the wall Twg, overall film coefficient h, gas film coefficient hg and liquid film coefficient hl, determine the expression for heat transferred per unit area q.
A.	q = hl (To – Twg)
B.	q = h (To – Twg)
C.	q = hg (To – Twg)
D.	q = hg/h (Twg – To)
Answer» D. q = hg/h (Twg – To)

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