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You add 30mL of water with a starting temperature of 22* C. After burning the marshmallow your water temperature is about 27* C, how and Calories were in your marshmallow

difficulty advanced
 Apr 23, 2015

Best Answer 

 #4
avatar+99317 
+5

You know, I really like white marshmellows, I could probably eat a few bags or them. 

Mmm, it would all be in the name of science.  

Trouble is I like them toasted on an open fire,  the drippier the better,  I don't mind even if they catch fire and get a bit burnt.

That might stuff up the experiment a bit though.  This must be thought through properly :/

 

 

 

 

 

Ok so marshmellows are sugar a little salt, and a little other carbohydrate.

That sound really healthy :/  

You page led me to this page  

https://www.google.com.au/webhp?sourceid=chrome-instant&ion=1&espv=2&ie=UTF-8#q=is%20sugar%20a%20carbohydrate%3f

 Apr 26, 2015
 #1
avatar+27547 
+5

Use energy = mass*specificheat capacity*temperature rise:

 

Assume density of water = 1000kg/m3, specific heat capacity of water = 4184 J/(kg.degC)

 

energy = 30*10-6m3*1000kg/m3*4184J/(kg.degC)*(27-22)degC = 627.6 J

 

1 J is about 0.2389 calories  so energy = 627.6*0.2389 ≈ 150 calories  (Note these are not food calories.  1 food calorie is 1000 small calories)

.

 Apr 24, 2015
 #2
avatar+99317 
0

thanks Alan :)

You know, if I wanted to know how many calories there are in a marshmellow, I'd probably just google it :/

Mmm, how boring would that be  :)))

 Apr 25, 2015
 #3
avatar+27547 
+5

Ok Melody, here's the boring way: http://www.sparkpeople.com/calories-in.asp?food=marshmallow 

 

The more interesting way would be to eat a marshmallow and measure your own temperature rise.  As one marshmallow would undoubtedly produce a temperature rise too small to measure you would probably have to eat several bags of them.  Have fun!

.

 Apr 25, 2015
 #4
avatar+99317 
+5
Best Answer

You know, I really like white marshmellows, I could probably eat a few bags or them. 

Mmm, it would all be in the name of science.  

Trouble is I like them toasted on an open fire,  the drippier the better,  I don't mind even if they catch fire and get a bit burnt.

That might stuff up the experiment a bit though.  This must be thought through properly :/

 

 

 

 

 

Ok so marshmellows are sugar a little salt, and a little other carbohydrate.

That sound really healthy :/  

You page led me to this page  

https://www.google.com.au/webhp?sourceid=chrome-instant&ion=1&espv=2&ie=UTF-8#q=is%20sugar%20a%20carbohydrate%3f

Melody Apr 26, 2015

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