Thermal decomposition of a rail car load of limestone to lime and carbon dioxide requires 2.97 x 106 kj of heat.

convert this energy to calories.

once you have the value, determine its log (base 10).

a)  

b)

Explanation:

Heat is defined as a spontaneous flow of energy from one object to another. It is measured in Joules, calories, kilo Joules etc.

These units of energy are inter convertible.

We are given:

a) Energy absorbed by limestone =

Converting this unit of temperature into by using conversion factor:

1 kJ = 239.006 calories

Thus the energy in calories is

b) The value of log base 10 of  is:

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