A serving of Cheez-Its releases 1.30 x 10^4 kcal (1 kcal = 4.18 kJ) when digested by your body. If this same amount of energy were transferred to 1.75 mg of water at 35˚C, what would the final temperature be?

Respuesta :

Answer:

The final temperature is:- 7428571463.57 °C

Explanation:

The expression for the calculation of heat is shown below as:-

[tex]Q=m\times C\times \Delta T[/tex]

Where,  

[tex]Q[/tex]  is the heat absorbed/released

m is the mass

C is the specific heat capacity

[tex]\Delta T[/tex]  is the temperature change

Thus, given that:-

Mass of water = 1.75 mg = 0.00175 g ( 1 g = 0.001 mg)

Specific heat of water = 4.18 J/g°C

Initial temperature = 35 °C

Final temperature = x °C

[tex]\Delta T=(x-35)\ ^0C/tex]

Q = [tex]1.3\times 10^4[/tex] kcal

Also, 1 kcal = 4.18 kJ = [tex]4.18\times 10^3[/tex] J

So, Q = [tex]1.3\times 10^4\times 4.18\times 10^3[/tex] J = 54340000 J

So,  

[tex]54340000=0.00175\times 4.18\times (x-35)[/tex]

[tex]0.00175\times \:4.18\left(x-35\right)=54340000[/tex]

[tex]x-35=\frac{54340000}{0.007315}[/tex]

[tex]x=7428571463.57[/tex]

Thus, the final temperature is:- 7428571463.57 °C