# How much heat is required to warm 1.30 kg of sand from 30°C to 100°C?

##### 1 Answer

Heating 1.30 Kg of sand 70 degrees Celsius takes 80,000 Joules of heat.

#### Explanation:

The amount of heat required to warm a substance is determined using heat capacity. The equation below allows us to solve for the heat released or absorbed when warming a substance.

For the equation above:

Specific heat capacity (

For sand,

In your specific problem:

(you must convert to grams when using specific heat capacities since they are in the units of grams)

Next we plug our values into the top equation listed:

Since your temperature has only one significant figure we round to one sig fig:

q = 80,000 J.

For more examples see this video: