Answer:
a)250.4 °C
Explanation:
Temperature at which pressure of water become equal to the surrounding pressure is called boiling temperature .
The boiling temperature of water at 4 MPa is 250.4 °C.As we know that when pressure of water increases then the boiling point of water also increases.The boiling point of water at 1 ar is 100 °C.So the boiling point of substance is not constant it varies with environment .
