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How much energy is required to heat an iron nail with a mass of 25.5 grams from 65°C until it becomes red hot at 720°C?

(C for iron = 0.4494 J/g°C).
Part A: Enter the variable symbol for the quantity you need to find. Use your keyboard and the keypad to enter your answer. Then click Done.

1 Answer

1 vote

Answer:


7506.1035J

Step-by-step explanation:

We can use the relation

Q =mcΔθ

to find the energy required to heat the iron nail, where Q is the heat energy required, m is the mass of the nail and Δθ is change in temperature and c is heat capacity of the iron nail.

Also, from the question,


m= 25.5g

c = 0.4494J/g°C

Δθ=720 - 65 = 655°C

By substitution


Q =25.5 * 0.4494 * 655


Q=7506.1035J

Hence the energy required to heat the iron nail is 7506.1035J

User Shxfee
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