Not the whole ocean of course, it is much too large. However at the point where lava enters the ocean some water will definitely boil off.
lava rock
because it is
The mid-ocean-ridge.
no it never wie
lava is formed when rocks melt
On contact with water lava will cool rapidly to form rock.
Because it is near the ocean
An underwater lava flow is called "pillow lava" when it forms from the rapid cooling of lava upon contact with water. This type of lava takes on a rounded, pillow-like shape due to the formation of a crust that traps the molten lava inside, which then expands and breaks through the surface. Pillow lava is commonly found at mid-ocean ridges and volcanic ocean floors.
Heat as well as lava can seep from cracks in the ocean floor.
When a volcano ejects lava from the ocean floor, the lava cools very rapidly. This causes the outside of the lava plume to solidify. Pressure builds inside this lava pillow, as it is usually described, until it breaks through a weak area in the pillow "shell" and forms a new lava pillow. The process repeats until the lava source is exhausted or the pressure wanes.
Yes, the heat of the lava may well turn some of the water into steam, but the sea will cool & solidify the lava.
Boil a lot of sea water.