The food Calorie is actually a kilocalorie, that is, 1000 cal. For: metabolic rate is 1750 Calories per day. Express this in kJ/d.

Bomb Calorimetry and Food Science Food energy is defined as the amount of energy obtained from food that is available through cellular respiration. Laboratories use bomb calorimeters to measure the total or gross energy value of various food macronutrients. Food energy is then based on the heat of combustion, determined by the bomb calorimeter, and corrections that take into consideration the efficiency of digestion and absorption and the production of urea and other substances in the urine. Note that one food calorie (or 1 kcal) is equal to 4.184 kilojoules. Question 4 (1 point) A 102.3-g sample of vodka is burned with excess oxygen in a bomb calorimeter with a heat capacity of 15.3 kJ-K-. The temperature of the calorimeter rises from 21.15°C to 82.09°C. What is the AUrxn value for the combustion of this vodka sample in units of kJ/g? Enter your numerical answer only (no units) to the correct amount of significant figures. Your Answer: Your Answer

a 22.01 g piece of unknown metal is heated to 100C and placed into a coffee cup calorimeter containing 1250. g of water. the intial temperature of the water was 25.0C the final temperature of the water and the metal is 26.2C. calculate the specific heat capacity of the metal and then identify the metal.

The average human lung expands by about 0.50 L during each breath. If this expansion occurs against an external pressure of 1.0 atm, how much work (in J) is done during the expansion?