Question

PRE-LAB 1. Define Heat capacity - The amount of neat supplied to a given mass of material to produce unit change in temperature units = or to b. Specific heat - the amant of heat supplied to one unit mass of substance in order to raise the temperature by one Unit Units of specific heat is you or gik 2. In an experiment to determine the heat capacity of a Styrofoam cup calorimeter, 50 ml of water at 47 C was added to 50 mL of water at 25 C in the calorimeter. The final temperature of the mixture was found to be 34°C Calculate the heat last by the hot water, the heat gained by the cold water, the heat absorbed by the calorimeter and the heat capacity of the calorimeter teat lost by hot water = heat gamed by cold 8700 (heat lost) 1082.8 ) (heat gained) of wat voluwex density water heata med by - water calorimeter 30.8 to calorimeter) L C heat capacity) - Sog 2. In ac was added to 50 m. llalate the heat lord babcity of the • SomL x D . 3. In the space provided below, combine reactions (1), (2), and (3) for this experiment to obtain reaction (4). (Reactions are given on the first page of instructions) (1) (2) (3) 4. To determine the specific heat of a metal, a heated sample of the metal weighing 33.3 g and a temperature of 125°C was added to a Styrofoam calorimeter containing 50 mL of water at a starting temperature of 25'C. The heat capacity of the calorimeter was 47'. If the final temperature was found to be SIC, what was the specific heat of the metal? 4700 x(51-25) °C = 12225 33-39 Sb., x(SI°C-125C)=-bbl. 23 509x4-1849 8 V (31-25°C = 54392] = fnetal -2, 7037 21 22 23 +5439.25 heat lost by metal=46661.25 tuated - 1661.23 33.39x(-74%)

#3

Answer 1

Ane ☺ Reverse reaction 1 Mach (aq) + H₂010)+ heat Add equation 2 and will get equation 4 as Mools) + 240 ~Alg to above reaction we shown below. Alz rolt lag) + H2O + heat MgO(s) + 2H1 - AH₂ gls) + 2Hulag) Moth log] ttt heat at h g) + O₂(g) Hoth) theat regls) + 1 Olg) mg 0(s) theat ang = AH, +AH - -AH