Answer:
(A) The work done by the system is -101.325J
(B) The workdone by the system is -90.75J
Explanation:
(A) Workdone = -PΔV
Given that A = 100cm2 = 0.01m2
distance d = 10cm = 0.1m
ΔV= Area × distance
ΔV= 0.01 ×0.1
ΔV = 0.001m3
P= external pressure = 1atm = 101325Pa
Workdone = -0.001 × 101325
W= - 101.325Pa m3
1Pam3 = 1J
Therefore W = - 101.325J
The work done on the system is -101.325J
(B) Workdone = -PΔV
Given that A = 50cm2 = 0.005m2
distance d = 15cm = 0.15m
ΔV= Area × distance
ΔV= 0.005×0.15
ΔV = 0.00075m3
P=121kPa = 121000Pa
W= - 121000 × 0.00075
W= -90.75Pa m3
1Pam3 = 1J
W = - 90.75J
The woekdone by the system is -90.75J
Unfortunately I don't work with the same units as put forward in this question but the equation I use for this is:
pressure*volume = moles*8.314*temperature
The units required for this equation are:
pressure in pascals
temperature in Kelvin
volume in m³
If you convert the units in the question to the units for this equation, you'll be able to work out the volume of oxygen gas in m³
Answer:
K2O2 and KO2 is the answer
Answer:
Basic or alkaline
Explanation:
ph 7 is neutral
below 7 is acidic
above 7 is basic or alkaline
Selenium (Se) the most common isotope of this element. The nucleus consists of 34 protons (red) and 46 neutrons (blue).