PHYS 1050 Lecture Notes - Lecture 7: British Thermal Unit, Iceberg, Calorie
Document Summary
From a hotter object to a cooler one. Note: the direction of heat flow is based on temperature not on the amount of internal energy. If you set a cup of coffee on an iceberg, the iceberg has a higher internal energy because it has more atoms and molecules. Calorie : the amount of heat required to change the temperature of 1 gram of water by 1 degree celsius. Joule (j) same unit as energy and work. Nutritional calorie = 1000 calories = 1 kilocalorie. British thermal unit (btu): amount of heat required to change the temperature of. 1 pound of water by 1 degree fahrenheit. The quantity of heat required to change the temperature of a unit mas of the substance by 1 degree. Low specific heat- you only need a little bit of energy to heat it up, but it will also cool off much faster.
