The heat for melting or freezing water, also called the Heat of Fusion (Hf), is 80 calories per gram at 0Â°C, which is the equilibrium temperature. In other words, it is necessary to add 80 calories of energy to melt one gram of ice at 0Â°C.
The CVV Number (Card Verification Value) on your credit card or debit card is a 3 digit number on VISAÂ®, MasterCardÂ® and DiscoverÂ® branded credit and debit cards. On your American ExpressÂ® branded credit or debit card it is a 4 digit numeric code.
Answer: The phone number for American Express Starwood Preferred Guest is 1-800-297-1000 or 1-800-528-4800 and they are open 24 hours. For Overseas callers, the phone number for American Express Starwood Preferred Guest Credit Card is 1-336-393-1111. You can also manage the American Express Starwood Preferred Guest online.