Answer:
You need to add 10 °C of heat.
Step-by-step explanation:
To find the quantity of heat in Celsius first we need to convert the units:
212 °F to °C (boiling point):
[tex] C_{1} = \frac{5}{9}(F - 32) = \frac{5}{9}(212 - 32) = 100 ^{\circ} C [/tex] (1)
194 °F to °C:
[tex] C_{2} = \frac{5}{9}(F - 32) = \frac{5}{9}(194 - 32) = 90 ^{\circ} C [/tex] (2)
Now we can find the quantity of heat that must be added by substrating equation (2) from (1):
[tex] \Delta C = C_{1} - C_{2} = 100 ^{\circ}C - 90 ^{\circ}C = 10^{\circ} C [/tex]
Therefore, you need to add 10 °C of heat to boil water that is 90 °C.
I hope it helps you!
