Hess' Law is used to

Q: Equal amounts of heat are added to equal masses of substances A and B at the same temperature, but…

A: Let us assume both the substances A and B have mass of m kg each, initial temperature be T. Let the…

Q: to answer t

A: Here, The heat lost by metal is equal to the heat gained by the water and the calorimeter.

Q: 125g of hot Bismuth is placed in 45.0 mL of water (d = 1 g/mL)  at 23.0°C. What was the original…

A: Uisng the concept of conservation of energyHeat lost by hot Bismuth = Heat gain by water…

Q: A 276.6g sample of water at -13.5 Celsius is taken to a final temperature of 14.46 Celsius. How…

A: Given  mass of water = 276.6 g  initial temperature = -13.5o C final temperature  = 14.46o C…

Q: A 30.25g sample of solid copper at 82 degrees Celsius is added to a cup with 50g of water at 21.1…

A: Given, For copper (Cu) mass of Cu (mCu) = 30.25 g Specific heat capacity of Cu (CpCu) = 0.386 J/g°C…

Q: A sample of liquid water is heated with an electrical coil. If 615 Joules of energy are added to a…

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Q: A sample of aluminum with mass of 53.2 g is initially at155oC. What is the temperature of the…

A: The specific heat capacity (C) of a given sample is defined as the quantity of energy as heat, that…

Q: A sample of water with a mass of 23.31 g and an initial temperature of 367.67 K   loses 8615 Joules.…

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Q: What are the factors affecting the Kinetic Energy (joules)? Why?

A: The energy possesed by body dueto its motion is known as kinetic energy.

Q: C. What is the overall temperature change? i °C

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Q: The ice cubes absorb 90,300 J of energy from the tea as it cools from 40 °C to 0 °C. What mass of…

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Q: 1. Select the incorrect statement. q is the symbol for heat q = mC;AT The unit for g is Joules q is…

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Q: A sample of liquid mercury is heated with an electrical coil. If 32.3 Joules of energy are added to…

A: Since the relationship between the heat added and temperature change is given by  Q = mCΔT  where Q…

Q: It takes 1250 J of energy to heat a certain sample of pure silver from 12.0 °C to 15.2 °C .…

A: Given: Mass of silver=? g Temperature change, ∆T=(15.2-12.0)°C=3.2 °C The ennergy needed, q =1250 J…

Q: If a piece of granite absorbs 6345J of energy and the temperature of the granite increases 101℃,…

A: the answer is given as follows  Mass of granite is 79.52 gram

Q: Discuss the nature of Energy?

A: ANSWERE IS DISCUSSED BELOW :

Q: A chemist measures the energy change AH during the following reaction: CL(9)+H,(9) 2 HCl(g) AH=-184,…

A: Given :  Cl2(g) + H2(g) → 2HCl(g)  ∆H = -184 kJ  To calculate ;-  amount of heat absorbed or…

Q: What are the main causes of kinetic energy?

A: Kinetic energy: The form of energy which led to motion of object. It depend only on mass of object…

Q: 5.45 State Hess’s law. Explain, with one example, theusefulness of Hess’s law in thermochemistry.

A: ANSWER IS DISCUSSED BELOW :

Q: Select true or false for each of the following. Heat and temperature are the same thing. Energy can…

A: 1. Heat is measure of energy while temperature is measured of degree of hottness and coldness of…

Q: A sample of gaseous helium is heated with an electrical coil. If 932 Joules of energy are added to a…

A: We can use the formula  Q= m x c x ∆T  Or  Q = m x c x (Tfinal - Tinitial)  Now Q = Heat = 932…

Q: A student obtained a clean flask. She weighed the flask and stopper on an analytical balance and…

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Q: The specific heat capacity of solid iodine is 0.427 J/g⋅⋅oC.  Calculate the final temperature (°C)…

A: given, specific heat capacity, C = 0.427 J/g⋅oC heat, q = 747.0 J mass of a sample of solid iodine =…

Q: Calculate the specific heat capacity of iron according to

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Q: Data for Calorimetry Part A: Mass of Unkown metal sample = 20.331 g Mass of empty calorimeter =…

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Q: E thermochemical equations

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Q: [Review Topics] [Reférences] Use the References to access important values if needed for this…

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Q: Is heat a matter or not? Why

A: Matter is defined as the substances that has mass and occupies space. Matter is composed of atoms or…

Q: Heat is typically measured in A. C B. F C. Joules D. Grams

A: Heat is a form of energy which is transferred from one body at higher temperature to another body at…

Q: How much energy is required to raise the temperature of 11.9 grams of solid iodine from 21.8 °C to…

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Q: A sample of solid aluminum is heated with an electrical coil. If 164 Joules of energy are added to a…

A: Specific heat capacity is the amount of heat in Joules is required by the substance to raise its…

Q: 6. Two units for energy are and

A: Energy is the capacity to do work or to produce heat.

Q: 18.7 grams of ethanol are heated from 18.2°C to 112.1°C how many joules of energy were required?

A: Given that,  Weight of ethanol m = 18.7 g Initial temperature of ethanol T1 = 18.2°C Final…

Q: A sample of solid titanium is heated with an electrical coil. If 111 Joules of energy are added to a…

A: q = 111 J m = 14.9 g Initial temperature = ( T1) = 23.2 °C Cs = 0.524 J/g°C Final temperature of…

Q: Suppose we have a piece of a candy bar that has an initial mass of 28g.  If we ignite the piece of…

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Q: A 3.002 gram peanut is combusted in a bomb calorimeter containing 100 mL of water at 21.3 degrees…

A: Given: mass ( m ) = 3.002 g  Temperature ( T1 ) = 21.3°C Temperature ( T2 )= 21.4°C Find heat of…

Q: The energy required to power a light bulb is 20 W . On an average, the bulb is switched on for 4…

A: The concept is used to solve the problem is forms of energy and energy conversion factors.The…

Q: in element as a specific 129 J/ g-Celsius , when ns of that certain element 2.33 KJ of Heat, what is…

A: Ans  Heat =mc ∆T Given Heat= 0.129 J/g.°c m=10 g ∆T= ?  c= 2.33kj = 2300 J Put in above equation

Q: Acetylene, C,H2, is used in welding torches. It releases a lot of energy when burned in oxygen. The…

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Q: 1 atm, how much energy is required to heat 85.0 g H, O(s) at -18.0 C to H, O(g) at 125.0 C? Use

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Q: The amount of energy needed to heat 2.00 grams of mercury from 50.00 to 90.00 is 11.28 Jules. The…

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Q: If we have a 45.0 g block of aluminum that is at 22ºC and heat it up with 1545 J of energy, what…

A: Since, specific heat of Al= 0.9 J/(g℃) so, Q = mCv∆T

Q: ch heat is

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Q: Match these words with their definition. Thermal energy [ Choose ] kinetic energy [ Choose ]…

A: The different energies of molecules due to different surroundings and processes are listed below-

Q: For this experiment, 16.55 grams of nitrogen gas and 10.15 grams of hydrogen gas are allowed to…

A: The chemical equation for the chemical reaction is shown in equation (1) where ΔrHo is the enthalpy…

Q: Use the References to access important values if needed for this question. A sample of gaseous…

A: Solution :    The amount of heat required to increase the specific amount of substance is given by…