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

Answer:

Q = 797.5 cal

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,

$Q=50\times 0.11\times (200-55)\\\\Q=797.5\ cal$

So, 797.5 calories of heat is needed.