The specific heat of iron is 0.11 cal (g°C) . A cafeteria fork made of iron has a mass of 20 grams. How much heat energy is needed to raise the temperature of this fork from 25°C to 75°C?

Question

A) 0.044 calories
B) 0.275 calories
C) 110 calories
D) 9090.9 calories

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Answer 1 · 2017-02-08T15:54:34

C

Required heat #Q# to raise the temperature of fork #=msDeltaT#
where #m# is mass, #s# is specific heat and #Delta T# is change in temperature.

Inserting given values we get

#Q=20xx0.11xx(75-25)#
#=>Q=20xx0.11xx50#
#=>Q=110" cal"#