How Can We Predict Spontaneity

On the basis of free energy change we can predict the spontaneity of a reaction. You should be able to manipulate the above mentioned equation, and once you have found the free energy change, you can do the prediction using the following guidelines. 

We use the term temperature quite a lot in Chemistry, but how can we define it Students often get confused with the terms temperature and heat. Even though temperature and heat are related, they are not the same. Let us consider two objects that are at different temperatures a hot object and a cold object. Let s say we kept them in close proximity for some time. The heat passes from the hot object to the cold one, until they reach equilibrium. So it is the heat (energy) that passes from the hot object to the cold one resulting in a change in temperature. 

The common scales used to denote temperature are the Celsius scale and the Kelvin scale (K). The SI unit of temperature is actually kelvin (K). The Celsius and the Kelvin scales can be easily converted back and forth, and are related by the following simple relations  

The other temperature scale that we are more familiar with is the Fahrenheit scale. Temperature denoted in degree Celsius can be converted to degree Fahrenheit using the following relation  

You are expected to know these conversions at this level of study in college. So know them  

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