10.0 grams of octane are burned in a bomb calorimeter containing 2.00 × 102 g h2o. if the water temperature increases from 25.00oc to 37.00oc, how much energy was released by the system?

ΔH=MCΔT
M : the mass of water (2.00x10^2)
C : water specific heat capacity (4.18 or 4.2)
ΔT : tempreture change 
so energy (J) released into the water is = (200 x 4.18 x 12) = 10032J
you can convert that to KJ : 10032 / 1000 = 10.032KJ

so the energy released by 10g of octane is 10032J or 10.032KJ

hope that helps

That result from subduction of oceanic plates beneath lighter continental plates. most of the earth's volcanoes are located around the pacific ring of fire because that the location of most of the earth's subduction zones.