What role does heat play in the formation of convection currents?

when water loses heat to cooler water, the cooler water becomes denser and sinks.

when water gains heat, it becomes denser and sinks.

when water loses heat, it becomes denser and sinks.

when water gains heat, it dissolves more solids and gases and becomes denser and sinks.

When 13.3 g koh is dissolved in 102.7 g of water in a coffee-cup calorimeter, the temperature rises from 21.4 °c to 31.53 °c. what is the enthalpy change per gram of koh (j/g) dissolved in the water? * take the density of water as 1.00 g/ml. * assume that the solution has a specific heat capacity of 4.18 j/g*k. enter to 1 decimal place. do not forget the appropriate sign /(+). canvas may auto-delete the (+) sign