How much ice (in grams) would have to melt to lower the
temperature of 355 mL of water from 26 ∘C to 6 ∘C? (You must
consider the enthalpy in cooling the water, as well as the enthalpy
in melting the ice and the enthalpy to heat the melted ice from 0∘C
up to the system's final temperature of 6 ∘C. Also assume that the
density of water is 1.0 g/mL.) Express your answer using two
significant figures.
30 grams of ice at -5 Celsius melt while being left at room
temperature of 28 Celsius. After melting its temperature rises to
28 Celsius. Determine the total change of entropy of the
environment.
[Cice = .5 cal/g.C, Lf = 79.6 cal/gram] 1 calorie = 4.184 J
30 grams of ice at -5 Celsius melt while being left at room
temperature of 28 Celsius. After melting its temperature
rises to 28 Celsius. Determine the total change of
entropy of the ice.
[Cice = .5 cal/g.C, Lf = 79.6 cal/gram] 1
calorie = 4.184 J
Group of answer choices
a) 53.11 J/K
b) 34.68 J/K
c) 38.27 J/K
d) 44.22 J/K
e) 49.97 J/K
How much ice is needed to make ice tea at a temperature of
50 C from 140 grams of hot tea at 650 C
contained in a glass container of 50 gm with specific heat equal to
0.2 cal/gm0 C. Treat the tea as colored water.
382 grams of ice with an initial temperature of −25.0
°? is placed in a styrofoam
cup (ignore the mass of the cup for this problem) containing 275 mL
of lemonade at
an initial temperature of 22.0 °?. Assume the density and specific
heat of lemonade
are the same as liquid water. What is the final temperature of the
system? If the final
temperature is zero, how much ice melts?
a-How much heat is required to convert 5.0 kg of ice from a
temperature of -10 C to water vapor at a temperature of 220F? b-You
have 200 g of coffee at 55 C, Coffee has the same specific heat as
water. How much ice at -5 C do you need to add in order to reduce
the coffee’s temperature to 27C.