A thermos keeps 500 g of black coffee at 85°C . After added 60g of milk at 25°C, the equilibrium temperature stops at 79°c. Assume that there is no heat loss during the mixing of coffee and milk, the specific heat of coffee is 4.2 Jg-1°C-1, (a) calculate the specific heat of milk in unit Jg-1°C-1 (b) calculate the heat capacity of milk.

A thermos keeps 500 g of black coffee at 85°C . After added 60g of milk at 25°C, the equilibrium temperature stops at 79°c. Assume that there is no heat loss during the mixing of coffee and milk, the specific heat of coffee is 4.2 Jg-1°C-1, (a) calculate the specific heat of milk in unit Jg-1°C-1 (b) calculate the heat capacity of milk.

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter1: Units, Trigonometry. And Vectors

Section: Chapter Questions

Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...

See similar textbooks

Similar questions

A 0.217 kg sample of tin initially at 96.9◦Cis dropped into 0.112 kg of water initially at10.2◦C.If the specific heat capacity of tin is230 J/kg ·◦C, what is the final equilibriumtemperature of the tin-water mixture? Thespecific heat of water is 4186 J/kg ·◦C.Answer in units of ◦C.
To treat a burn on his hand, a person decides to place an ice cube on the burned skin. The mass of the ice cube is 16.8 g, and its initial temperature is -10.7 °C. The water resulting from the melted ice reaches the temperature of his skin, 29.4 'C. How much heat is absorbed by the ice cube and resulting water? Assume that all of the water remains in the hand. Constants for water can be found in this table.
490 grams of copper pellets are removed from 260°C oven and immediately dropped into 350 mL of water in an insulated cup. The temperature of water raises 39°C then remains at that temperature. Calculate the following: a) Mass of water in kilograms b) The heat energy removed from copper pellets in joules . (Sp.Heat of copper is 385 J/Kg°C) c) The initial temperature of water in degree celsius - (Sp.Heat of water = 4186 J/kg°C)
The number of kilocalories in food is determined by calorimetry techniques in which the food is burned and the amount of heat transfer is measured. How many kilocalories per gram are there in a 5.00-g peanut if the energy from burning it is transferred to 0.500 kg of water held in a 0.100-kg aluminum cup, causing a 54.9°C temperature increase?
When resting, a person has a metabolic rate of about 7.030 x 10° joules per hour. The person is submerged neck-deep into a tub containing 2.130 x 10° kg of water at 26.30 °C. If the heat from the person goes only into the water, find the water temperature in degrees Celsius after half an hour, Number Units eTextbook and Media Attempts: unlimited Submit Answer Save for Later
The initial temperature of 60 g of ice is -200C. The specific heat capacity of ice is 0.5 cal/g.C0 and water’s is 1 cal/g.C0. The latent heat of fusion of water is 80 cal/g. How much heat is required to raise the ice to 00C and completely melt the ice? (b) How much additional heat is required to heat the water (obtained by melting the ice) to 620C?
Large meteors sometimes strike the Earth, converting most of their kinetic energy into thermal energy. (a) What is the kinetic energy of a 109kg meteor moving at 25.0 km/s? (b) If this meteor lands in a deep ocean and 80% of its kinetic energy goes into heating water, how many kilograms of water could it raise by 5.0°C?
A small building has a heater inside it running with its door left open. The heater is the only device in the building. When the heater runs, it consumes 250 W. The building is 3m X 3m X 2.5m. The temperature outside is 25 degrees celsius, and the the wind is blowing at 10km per hour. Estimate the temperature inside the building if the walls and ceiling are made of 13 mm thick plywood and 13 mm thick drywall with 100 mm of air inbetween. The floor is perfectly insulated and there aren't any cracks in the walls ceiling or door frame. Make any other reasonable assumptions as needed
A food product containing 80% moisture content is being frozen. Estimate the specific heat of the product at -6 ° C when 80% of the water is frozen. The specific heat of the dry product is 2 kJ / (kg ° C). it is assumed that the specific heat of water at -10 ° C is the same as the specific heat of water at 0 ° C, and the specific heat of ice follows the function Cp ice = 0.0062 Freezing point + 2.0649. Cp of frozen product = .... kJ / kg ° C.
Oil enters the outer tube of an insulated concentric tube heat exchanger at a temperature of 500K and exits at a temperature of 400K. The mass flow rate of the oil is 5kg/s, and the oil has a specific heat of 1.91 kJ/kgK. Saturated liquid water at 100°C enters the inner tube and exits at 100°C with a quality of 0.2. Determine the mass flow rate of the water.
A 160 g copper bowl contains 120 g of water, both at 25.0°C. A very hot 420 g copper cylinder is dropped into the water, causing the water to boil, with 5,00 g being converted to steam. The final temperature of the system is 100°C. Neglect energy transfers with the environment. (a) How much energy is transferred to the water as heat? (b) How much to the bowl? (c) What is the original temperature of the cylinder? The specific heat of water is 1 cal/g-K, and of copper is 0.0923 cal/g-K. The latent heat of vaporization of water is 539 Cal/kg.
A 83.78 gram copper metal is heated to 132°C and dropped into 125.76 gram of water at an initial temperature of Ty. When equilibrium is reached the temperature of copper-water mixture is 25°C. Calculate the initial temperature of water? If the specific heat of copper is 385 J/kg°C and Specific heat of water is 4186 J/kg°C. Initial temperature of water in (°C) =