How much heat is required to raise the temperature of 150g of iron 20c to 25c?(specific heat of iron =480j/kg.c)

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Answer 1 · 2018-02-26T12:37:38

#300"J"# of energy.

The formula for specific heat is:

#E=mctheta#, where:

#E# is the energy needed in joules,

#m# is the mass in kilograms,

#c# is the specific heat,

#theta# is the change in temperature, Celsius of Kelvin doesn't matter.

Here,

#m=0.125"kg"#

#c=480"J/kg"^@"C"#

#theta=5^@"C"#, and inputting:

#E=0.125*480*5#

#E=300"J"# of energy is needed.