In a coffee-cup calorimeter, 1 mol naoh and 1 mol hbr initially at 25.5 oc (celsius) are mixed in 100g of water to yield the following reaction: naoh + hbr → na+(aq) + br-(aq) + h2o(l)after mixing the temperature rises to 86 oc. calculate the change in enthalpy of this reaction. specific heat of the solution = 4.184 j/(g oc)the molecular weight of naoh is 40.0 g/mol, and the molecular weight of hbr is 80.9 g/mol.δh =

When 13.3 g koh is dissolved in 102.7 g of water in a coffee-cup calorimeter, the temperature rises from 21.4 °c to 31.53 °c. what is the enthalpy change per gram of koh (j/g) dissolved in the water? * take the density of water as 1.00 g/ml. * assume that the solution has a specific heat capacity of 4.18 j/g*k. enter to 1 decimal place. do not forget the appropriate sign /(+). canvas may auto-delete the (+) sign

Pegmatites are igneous rocks in which the individual minerals are very large. typically, the minerals are all light-colored quartz, feldspar and muscovite. if you were given a black and white photograph of a pegmatite in a quarry (where the rock has been blasted and broken), what physical properties could you use to identify those three minerals in this hypothetical photo? describe each mineral and the specific diagnostic properties. be specific.

What is the most common form of matter in the universe