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.
Lost or Stolen Card: 1-800-327-1267. 1  American Express, for service in English, say English. [para los servicios en espaÃ±olas viga espaÃ±olas] 2  Sorry I didnât get that; you can say English or Press one. To better service your request, please says or enter your 15 digit account number.