Question #94672

1 Answer

Answer:

The new pressure #"P"_2=420\ "kPa"#

Explanation:

The general equation of ideal gases follows the following form:
#("P"_1*"V"_1)/("R"*"T"_1)=("P"_2*"V"_2)/("R"*"T"_2)# .......... (1)
At constant temperature, #"T"_1# = #"T"_2#. Thus, the equation Form (1) is reduced to: #"P"_1*"V"_1="P"_2*"V"_2#, which will lead to the following form:
#"P"_2=("P"_1*"V"_1)/"V"_2# ................. (2)
#"P"_2=(42\ "kPa"*20\ "L")/(2\ "L")#
So, #"P"_2=420\ "kPa"#
With kind regards: Mamdouh Younes