Question

PLEASE SHOW ALL YOUR WORK CLEARLY, AND EXPLAIN YOUR PROCESS.

DATA:

Initial mass of cup with water = 99.69 g
Final mass of cup with water = 150.89 g
Initial temperature of water = 41 °C
Final temperature of water = 4.4 °C

Analysis

a) Determine the mass of the ice that has melted.

b) Determine the variation of the water temperature (ΔT).

c) Calculate the energy (in J) released by 100 g of water when it cooled by ΔT. The specific heat capacity(c) of water is 4.18 J/(g°C). Use the formula Q = mcΔT and the mass of water.
d) Convert your answer into kJ.

e) Calculate the energy necessary to melt 1 g of ice (in kJ). Use the mass of ice.

f) Using the results from this experiment, determine how many kJ are required to melt 1 mole of ice.

g) Write the chemical equation for the melting of ice. Don't forget to include the value for the energy term in your equation.

Answer 1

a the mass dt the ice as Reen melliol (@69.66-868-as1) S1209 6The varcation d he tempe rature = (44-41)e = -36.6c Hert relea2ed () me 4T 100 00 Chiven B817 = ? 4T -36.6"c = (100-03)x (4-18Tg't")x (36-6) heat Sealened 15298.8J 1298.8J d heat relened 1000 Joule KJ. KJ Joule Th 1000 1 X 15298-8 K J I5298.8 Joule= 1000 1 S. 29 88 KJ