Question

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?

Answer 1

The amount of energy needed is 110 calories. We know this by dong the following:
Q=20×0.11×(75−25)
⇒Q=20×0.11×50
⇒Q=110 cal
Bu doing this you have the required heat represented as Q that is supposed to raise the temperature of fork that will be equivalent to the mass multiplied by the specific heat and also by the change in temperature