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.
Last updated 05 February 2014. The card security code also known as Card Verification Value 2 (CVV2) and Card Validation Code 2 (CVC2) is a unique 3 or 4- digit number printed on your Commonwealth Bank credit card. The 4- digit Commonwealth Bank American ExpressÂ® Card code is located on the front of the card, above the card number on the right hand side. With a MasterCardÂ® or Visa card, the 3- digit number is located in the signature panel on the back of the card. The 3 or 4 digit code uniquely identifies that a card number quoted to a merchant was obtained from a genuine credit card therefore providing merchants with an increased level of protection against fraud.