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Eric warms up 1kg milk in a pan on a gas stove from 20 °C to 80 °C. Of the energy the gas supplies, 50% is lost and 20% is absorbed by the pan. The remaining energy goes to the milk. The formula for the specific heat of the milk is 3,9 J/g · °C. The heat of combustion of the gas is 32 MJ/m3. How many cubic meters of gas has been burnt by Eric? 

 

A. 0,0024

B. 0,024

C. 0,15

D. 0,24

E. 1,5

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 Jun 21, 2019
 #1
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"Eric warms up 1kg milk in a pan on a gas stove from 20 °C to 80 °C. Of the energy the gas supplies, 50% is lost and 20% is absorbed by the pan. The remaining energy goes to the milk. The formula for the specific heat of the milk is 3,9 J/g · °C. The heat of combustion of the gas is 32 MJ/m3. How many cubic meters of gas has been burnt by Eric?"

 

 Jun 21, 2019
 #2
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Ahh I understand it now :) I find it hard to put the information into the formulas

Guest Jun 21, 2019

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