Whisky stones help keep whisky at the ideal tasting temperature of 15 degrees ce
ID: 966592 • Letter: W
Question
Whisky stones help keep whisky at the ideal tasting temperature of 15 degrees celsius. Three cubes of soapstone with side lengths of 0.75 inches are placed in the glass with whisky. a. How much energy must the soapstone cubes absorb to return 2 oz of 22 degrees celsius whisky to the ideal temperature? Assume the specific heat of whisky/density is same as water. b. To what temperature do the three whisky stones need to be cooled to carry out this process? c. If you accidentally cooled your whisky stones to -22.9 celsius what would the final temperature of the whisky be? Would whisky stones be a practical way of keeping coffee at the ideal temperature of 90 celsius?
Explanation / Answer
2 oz whiskey is 56.7 mL and assuming 1g/mL density it is 56.7 g
Q= Specific heat of water x mass x delta T
Q = 4.184 x 56.7 (22-15)
Q= 1660.6 J of energy has to be absorbed
Assuming the density of soapstone is 2.96g/cc
Th volume of each soapstone is 1.93= 6.86 cm3 = 20.3 g total soapstone weight is 60.91 g.
Assuming the specific heat capacity of soapstone is 0.785 J/g.K, as given in literature
1660.6 = 0.785 x 60.91 x delta T
delta T = 34.73
since the final temperature is 15oC the initial temperature should be -19.73oC.
If you accidentally cooled your whisky stone to -22.9 oC. The final temperature of the whisky would be
4.184 x 56.7 x (22-T1) = 0.785 x 60.91 x (T1+22.9)
5219.1 - 237.2T1 = 47.8T1+1094.9
4124 = 285 T1
T1 = 14.47 oC
14.47oC will be the final temperature of the whisky if the soapstones start from -22.9oC
Related Questions
Navigate
Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.