Consider the following thermochemical equation:
2ch3oh(l) + 3o2(g) → 2co2(g) + 4h2o(g) ∆horxn = –1277 kj
what mass of water can be heated from 23.5°c to 88.2°c with the heat that is released from the combustion of 12.0 g of ch3oh (molar mass = 32.0 g/mol), assuming no heat is lost to the surroundings? specific heat capacity of h2o = 4.184 j/g°c.

The electric field between square plates of a parallel-plate capacitor has magnitude e. the potential across the plates is maintained with constant voltage by a battery as they are pulled apart to twice their original separation, which is small compared to the dimensions of the plates. the magnitude of the electric field between the plates is now equal to a)e b)e/4 c)e/2 d)4e e)2e