An exothermic change will be when rain becomes sleet when the temperature falls below 0 degree Celcius. An exothermic change or reaction is a chemical reaction that release energy by light or heat. It is the opposite of an endothermic reaction. Expressed in a chemical equation: Reactants = products +energy.
PV=nRT
So
NRT/P=V ...
SI units for pressure is pascals so 81.8KPA = 81.8 x 10^3 PA
SI units for temperature is kelvin so 15 degrees celsius = 15 +273 = 288K
(0.582 x 8.314 x 288)/81.8 x 10^3 = 0.017 m3 (cubic meters)
The answer is Base.
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