NOTE: the ice must be at 0°C so, if taken out of a freezer, it must be left at room temperature and allowed to partially melt. "Dry" each ice chunk with a towel before adding to the calorimeter so that you are adding only solid, no liquid. Your collected data should look similar to the time-temperature curve above.
CALCULATIONS:
Specific Heat of water at room temperature is... 4.180 j/g °C .
The heat gained or lost by water is.. joules = (4.180 j/g °C) (temperature change)(mass)
Experimental Data
Mass of empty calorimeter and stirrer.. 12.43 g
Mass of calorimeter, stirrer and hot water.. 51.45 g
Mass of calorimeter, stirrer and water at the end... 68.47 g
Calorimeter Constant..... 0.794 j/oC
Temperature of Hot Water..... 71.54 oC
Final temperature of water in calorimeter.... 25.63 oC
CALCULATE: (to the correct number of sig figs; use correct units; mass in g (grams), energy in j (joules)). a) Mass of hot water used.... __________39.02______
b) Mass of ice added... _______17.02________
c) Temperature decrease of hot water.... ________45.91_______ °C
d) Temperature increase of the melted ice... _____25.63__________ °C
e) Heat lost by the hot water ... _______7488________
f) Heat lost by the calorimeter . _______36.45________
g) Heat gained by the melted ice water . _____1823.4__________
h) Heat of Fusion per g of ICE... _______________
h) Entropy change melting ice @ 273.15 K _______________ j/mol K
I need help with the last
2 just help me figure out how to do it