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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 Cal

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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

Apr 23, 2015

#4
+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 :/

Apr 26, 2015

#1
+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)

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Apr 24, 2015
#2
+99317
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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
+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!

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Apr 25, 2015
#4
+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 :/