How many calories of heat must be added to 75 grams of water at 20 degrees to become 100 degree of steam? Please answer ASAP it’s due today by 11pm. I would appreciate it if you could answer by today. Thanks in advance.

Engines for propeller-driven aircraft are limited in their maximum rotational speed by the fact that the tip speed of the propeller must not approach the speed of sound in air (mach i). taking 6 ft as a typical diameter for a propeller of a light airplane and 1100 fils as the speed of sound, find the upper limit on the rpm (revolutions per minute) of the propeller shaft.