How to understand this ?

Question

Diagram below shows an activity whereby the volume of a piston cylinder is reduced to half of its original volume.

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Answer 1 · 2018-06-01T00:23:39

#"B"#

At a constant temperature, we can use Boyle's law, which states that,

#Pprop1/V# or #P_1V_1=P_2V_2#

Here, we have #V_2=1/2V_1,=>V_1=2V_2#.

#=>2P_1V_2=P_2V_2#

#P_2=(2P_1V_2)/V_2#

#=2P_1#

So, the pressure will be doubled. However, there is only one statement that corresponds to the pressure here, so I'd safely choose that one.