Comments on: Energy the body expends from raising temperature of 350 mL of Diet Soda? http://www.veryeasyenergydrink.com/uncategorized/energy-the-body-expends-from-raising-temperature-of-350-ml-of-diet-soda/ Sat, 04 Sep 2010 06:22:54 +0000 hourly 1 http://wordpress.org/?v=3.0.1 By: Doctor Y http://www.veryeasyenergydrink.com/uncategorized/energy-the-body-expends-from-raising-temperature-of-350-ml-of-diet-soda/comment-page-1/#comment-1140 Doctor Y Tue, 29 Sep 2009 05:59:59 +0000 http://www.veryeasyenergydrink.com/energy-beverage/energy-the-body-expends-from-raising-temperature-of-350-ml-of-diet-soda#comment-1140 Okay. The specific heat of water is 4.184 J/gK. Water has a density of 0.998 g/mL at standard conditions. For the sake of ease of use, I'll assume these characteristics are constant throughout the process (they probably aren't, but the difference isn't likely to be significant). Our 350 mL of soda, then, weighs about 350 x 0.998 = 349 grams. So that means it will take 4.184 x 349 = 1461 J/K to heat it up. The temperature change is from 5 to 37 C, so that's a difference of 32 C, which is the same difference in K. So that's a total of 1461 x 32 = 46767 J altogether. One joule is 4.18 calories, so that becomes 11188 calories, but dietary Calories (with a capital c) are actually kcal, so that's 11.2 kcal of energy that's used to heat up that soda. If you're drinking diet soda, you get 1 kcal in but use 11.2 kcal, so you have a net energy expenditure of 10.2 kcal (I never thought of drinking soda as being like exercise before...). A non-diet soda, on the other hand, gives you 240 kcal... of which you use 11.2, leaving you having consumed still a total of 228.8 kcal. No wonder 30% of America is obese! Hope that helps!<br><b>References : </b><br> Okay. The specific heat of water is 4.184 J/gK. Water has a density of 0.998 g/mL at standard conditions. For the sake of ease of use, I’ll assume these characteristics are constant throughout the process (they probably aren’t, but the difference isn’t likely to be significant).

Our 350 mL of soda, then, weighs about 350 x 0.998 = 349 grams. So that means it will take 4.184 x 349 = 1461 J/K to heat it up. The temperature change is from 5 to 37 C, so that’s a difference of 32 C, which is the same difference in K. So that’s a total of 1461 x 32 = 46767 J altogether.

One joule is 4.18 calories, so that becomes 11188 calories, but dietary Calories (with a capital c) are actually kcal, so that’s 11.2 kcal of energy that’s used to heat up that soda.

If you’re drinking diet soda, you get 1 kcal in but use 11.2 kcal, so you have a net energy expenditure of 10.2 kcal (I never thought of drinking soda as being like exercise before…).

A non-diet soda, on the other hand, gives you 240 kcal… of which you use 11.2, leaving you having consumed still a total of 228.8 kcal. No wonder 30% of America is obese!

Hope that helps!
References :

]]>