4.05 * 10^4 J to cal

The following information is given for antimony at 1atm: Tb = 1440.00°C Im 631.00°C Specific heat solid Specific heat liquid = : 0.2090 J/g °C 0.2590 J/g °C = AHvap (1440.00°C) = 1.605 × 10³ J/g AH fus (631.00°C) = 161.1 J/g A 43.60 g sample of liquid antimony at 719.00°C is poured into a mold and allowed to cool to 21.00°C. How many kJ of energy are released in this process? (Report the answer as a positive number.) Energy = | kJ

When ammonia is oxidized it produces nitrogen monoxide and heat: 4NH3(g)+ 5O2(g)--> 4NO(g) +6H2O(g)        "Triangle symbol"H degrees= -906kJ                 (a) Is the reaction endothermic or exothermic? Explain your answer.             (b) If the reaction is carried out in a bomb calorimeter, will the temperature of the calorimeter increase or decrease? Explain your answer.             (c) Is the internal energy of the products or reactants higher? Explain your answer.

In the following equation for a chemical reaction, the notation (s), (1), or (g) indicates whether the substance indicated is in the solid, liquid, or gaseous state. 2NO(g) + 2H2(g) →N2(g) + 2H,O(M) + energy Identify each of the following as a product or a reactant: H2O)| NO(g) N2(g) H2(g) When the reaction takes place energy is The reaction is

The following information is given for bismuth at 1 atm: Tb 1627.00°C AHvap (1627.00°C) = 822.9 J/g = Tm = 271.00°C AHfus (271.00°C) = 52.60 3/g Specific heat solid = 0.1260 J/g °C Specific heat liquid = 0.1510 J/g °C A 46.90 g sample of solid bismuth is initially at 253.00°C. If 3.332 x 10³ J of heat are added to the sample at constant pressure ( P = 1 atm), which of the following is/are true? (Select all that apply.) The sample is a gas. The sample is at a temperature of 271.00°C. The sample is at a temperature greater than 271.00°C. The sample is a liquid. The sample is a solid in equilibrium with liquid.

A piece of unknown substance weighs 55.8 g and requires 1910 J to increase its temperature from 21.7°C to 87.4°C. (a) What is the specific heat (in J/g-°C) of the substance? 4.0 J/g.°C (b) If it is one of the substances found in the table below, what is its likely identity? Specific Heats of Common Substances at 25°C and 1 bar Substance Symbol (state) Specific Heat (J/g-°C) O gold Au(s) 0.129 O copper Cu(s) 0.384 O iron Fe(s) 0.449 O argon Ar(g) 0.521 O silicon Si(s) 0.712 O carbon dioxide Co,(0) 0.843 O aluminum Al(s) 0.904 O nitrogen N2(g) 1.039 water H20(1) 4.1801 O helium He(g) 5.196 Type here to search hp 112 fs f6 144 sc & 8 Q E A J K B. FL %24

The combustion of butane produces heat according to the equation2C4H10(g) + 13O2(g) --> 8CO2(g) + 10H2O(l)               ΔH  = -5,314.0 kJ   What is the change in heat if 13.98 g C4H10 (58.12g/mol) reacts?(Answer should have one place after the decimal. Watch the sign)

A certain reaction has Ho = -43.40 kJ and So = 23.20 J/K.(a) Is this reaction exothermic, endothermic or isothermic (neither)?This reaction is________      .(b) Does this reaction lead to a decrease, an increase, or no change in the degree of disorder in the system?This reaction leads to_______      in the disorder of the system.

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Express the quantity of 55.69 cal in joules. Where: 1 cal = 4.184 J =   j