Question

Convert 1.5atm to pascals.

Answer 1

Hint: Pressure is the force applied perpendicular to the surface of an object per unit area over which that force is distributed. It is incorrect (although rather usual) to say the pressure is directed in this or that direction. The pressure, as a scalar quantity, has no particular direction.

Complete answer:
Atmospheric pressure, also known as barometric pressure (after the barometer), is the pressure within the atmosphere of Earth. The standard atmosphere (\[atm\] ) is a unit of pressure defined as \[101,325\;Pa\;\]. The \[atm\] unit is roughly equivalent to the mean sea-level atmospheric pressure on Earth, that is, the Earth's atmospheric pressure at sea level is approximately \[1{\text{ }}atm\] .
Atmospheric pressure is caused by the gravitational attraction of the planet on the atmospheric gases above the surface, and is a function of the mass of the planet, the radius of the surface, and the amount and composition of the gases and their vertical distribution in the atmosphere. It is modified by planetary rotation and local effects such as wind velocity, density variations due to temperature and variations in composition.
As we know from the above statements,
$1atm = 101325Pa$
In the question, the atmospheric pressure value is given as $1.5atm$ .
Thus, in terms of pascals ($Pa$ ), the value of atmospheric pressure will be:
$ \Rightarrow 1.5atm = 1.5 \times (1atm)$
$ \Rightarrow 1.5atm = 1.5 \times 101325Pa = 151987.5Pa$
In terms of proper order of magnitude, the atmospheric pressure can be written as:
$1.5atm = (1.519875 \times {10^5})Pa$

Note:
 The standard atmosphere (\[atm\] ) is an established constant. It is approximately equal to typical air pressure at Earth mean sea level and is defined as \[101325\;Pa\] . Because pressure is commonly measured by its ability to displace a column of liquid in a manometer, pressures are often expressed as a depth of a particular fluid (e.g., centimetres of water, millimetres of mercury or inches of mercury).