Answer:
See explanation
Explanation:
In this case, we can start with the calculation of the total energy released by the 20 matches. One match release 838.2 J of energy ( 1 match = 838.2 J). So:
[tex]20~matches\frac{838.2~J}{1~match}=16764~J[/tex]
With this in mind, we have to find al the conversion ratios to "Jolues", so:
[tex]1~KJ=1000~J[/tex]
[tex]1~Cal=4.184~J[/tex]
[tex]1~KCal=4184~J[/tex]
[tex]0.000239~food~calories=1~J[/tex]
Now, we can do the conversions:
[tex]16764~J\frac{1~KJ}{1000~J}=16.76~KJ[/tex]
[tex]16764~J\frac{1~Cal}{4.184~J}=4.005x10^3~Cal[/tex]
[tex]16764~J\frac{1~KCal}{4184~J}=4.007~KCal[/tex]
[tex]16764~J\frac{0.000239~food calories}{1~J}=4.006~food calories[/tex]
I hope it helps!
