Are used to measure the heat-producing capabilities of a chemical or mechanism. a. british thermal units b. gallons c. newton-meters d. pound-feet

A. British thermal units

Explanation:

Now firstly we have to understand the definition of British thermal unit or BTU.  It is defined as the amount of heat required to raise the temperature of 1 pound of water to 1 degree Fahrenheit. Now as expressed by its name, it is the unit for calculation of amount of heat. The most famous unit for heat is Joule.

1 BTU = 1055 Joules.

Now as we know, temperature is degree of hotness or coldness of body. So, for example, when on providing heat, when temperature of water raises from 50° F to 51° F, it will be stated that 1 BTU of heat is provided. Same concept can be applied for loss of heat.

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