How much heat is transferred to the environment when the temperature of 2.00 kg of water drops from 84∘ ∘ C to 39∘∘C? (Express your answer to three significant figures.)
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How much heat is transferred to the environment when the temperature of 2.00 kg of water...
How much heat (in joules) is required to raise the temperature of 34.0 kg of water from 24 ∘C to 89 ∘C? The specific heat of water is 4186 J/kg⋅C∘. Express your answer using two significant figures.
The amount of boiling water required to raise the temperature of 25.0 kg of water in the bath to body temperature is 4.80 kg. In this process, the heat lost by the boiling water is equal to the heat gained by the room- temperature water. How much heat was transferred in this process? Express your answer to four significant figures and include the appropriate units.
300 J of heat energy are transferred to 40 g of mercury. 1. By how much does the temperature of mercury increase? The specific heat of mercury is 140 J/kg⋅K. Express your answer using two significant figures.
Part A How much heat must be removed from 0.45 kg of water at 0°C to make ice cubes at 0 °C? Express your answer using two significant figures. O AQ O a ? Submit Request Answer
A) How much heat must be absorbed by a 23.0 g sample of water to raise its temperature from 30.0 ∘C to 50.0 ∘C? (For water, Cs=4.18J/g∘C.) Express your answer to three significant figures and include the appropriate units. ΔErxn = nothing kJ/mol B) anganese reacts with hydrochloric acid to produce manganese(II) chloride and hydrogen gas. Mn(s)+2HCl(aq) → MnCl2(aq)+H2(g) You may want to reference (Page 271) Section 6.7 while completing this problem. Part A When 0.635 g Mn is combined...
1. Calculate the final temperature that results when a 12.8 g sample of water at 23.1 ∘C absorbs 885 J of heat. Express your answer in degrees Celsius to three significant figures. 2.Calculate the final temperature that results when a 1.63 kg sample of platinum at 78.4 ∘C gives off 1.15 kcal of heat (specific heat of Pt=0.032cal g^−1∘C^−1) Express your answer in degrees Celsius to two significant figures.
1. How much heat is needed to raise the temperature of 3 kg of water from 20oC to 40oC? Give answer in kJ (1kJ = 1000 J) (round answer to 3 sig fig) 2. How much heat is needed to raise the temperature of 3 kg of ice from -40oC to -20oC? (round answer to 3 sig fig) Specific heat of water: C = 4180 J/kgK Specific heat of ice: C = 2090 J/kgK Specific heat of ethanol: C= 2440...
How much heat is required to warm 1.70 kg of sand from 30C to 100C. Express answer in joules to three significant figures.
Heat, q, is energy transferred between a system and its surroundings. For a process that involves a temperature change q=m⋅Cs⋅ΔT where Cs is specific heat and m is mass. Heat can also be transferred at a constant temperature when there is a change in state. For a process that involves a phase change q=n⋅ΔH where, n is the number of moles and ΔH is the enthalpy of fusion, vaporization, or sublimation. The following table provides the specific heat and enthalpy...
(a)How much heat transfer (in kcal) is required to raise the temperature of a 0.600 kg aluminum pot containing 2.00 kg of water from 45.0°C to the boiling point and then boil away 0.650 kg of water? _______kcal (b) How long (in s) does this take if the rate of heat transfer is 550 W (1 watt = 1 joule/second (1 W = 1 J/s))? ________s