If chilled coke and hot tea are kept together , coke gets warm why ?

According to the law of heat , heat always flows from hotter body to colder body until they gain equilibrium state. When hot tea is mixed to chilled coke, tea loses heat and coke gains heat. Thus, tea cools down but coke gets heated. 

Because it is liquid and liquid does not totally cool down to the ambient temperature, it and the iced drink will eventually reach the same temperature. Because the drink had ice in it, it will take it a bit longer to match the temperature of the cooling down cup of tea.consuming hot beverages, such as tea or hot water, will raise your core body temperature. ... Water evaporates very quickly from the skin. And when water evaporates, McNaughton explains, "that cools you down."

Relationship between heat and temperature

Temperature is a measure of the average kinetic energy of the atoms or molecules in the system. The water molecules in a cup of hot coffee have a higher average kinetic energy than the water molecules in a cup of iced tea, which also means they are moving at a higher velocity.Energy Is Transferred From The Table To The Mug. Static Electricity Builds As The Mug Sits On The Table, Which Causes Heat To Accumulate.

Best way to cool down your drink  involves using a metal stirring spoon as a heat sink for your drink. Leave the spoon in your drink so it can absorb the heat, then pull it out so it can cool off, and dip it back in again. Repeat the process and your drink will cool down to a reasonable temperature in no time.If the surrounding temperature is greater than the glass of chilled water, chilled water will gain heat from the surrounding and ultimately both will become same..which means galss of chilled water becomes hot due to the surrounding temperature…

Fourier's law