Question

2. How many calories are needed to raise 50 g of iron from 55°C to 200°C? (c = 0.110 cal/g °C)

Answer 1

Q = 797.5 cal

Step-by-step explanation:

Given that,

Mass of iron, m = 50 g

The temperature rises from 55°C to 200°C.

We need to find the heat needed to raise the temperature. The heat raised is given by :

`Q=mc\Delta T`

Put all the values,

`Q=50* 0.11* (200-55)\\\\Q=797.5\ cal`

So, 797.5 calories of heat is needed.