How we convert 760 torr into 101325 newton per meter square?

Answer 1

760 torr is equivalent to the pressure exerted by the mass of a column of Mercury that is 760 mm (or 0.76 metres) high.

That is, the pressure exerted by a mass of 0.76 cubic metres of mercury on an area of one square metre.

Density of mercury = 13.534 g/cm3 or 13,534 kg/m3.

So mass of column of mercury = 0.76*13.534 = 10,286 kg

Therefore pressure = weight of 10,286 kg/m2

= 10,286*g Newtons/m2

Now, g = 9.80665 (average of polar and equatorial values)

Therefore, pressure = 10,286*9.80665 = 100,870 Newtons/sq metre.

I cannot get the exact value but that may be because of rounding of "constants".