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Which of the following are state functions? (Select all that apply.)
- Energy
- Heat
- Enthalpy
- Work
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- Calculate the energy change for a pure substance over a temperature range. Close Problem Question Content Area The following information is given for mercury at 1 atm: boiling point = 356.6 °C Hvap(356.6 °C) = 295.6 J/g melting point = -38.90 °C Hfus(-38.90 °C) = 11.60 J/g specific heat gas = 0.1040 J/g °C specific heat liquid = 0.1390 J/g °C A 37.80 g sample of liquid mercury is initially at 78.40 °C. If the sample is heated at constant pressure (P = 1 atm), calculate the amount of energy in kJ needed to raise the temperature of the sample to 368.20 °C. KJWhich of the following are state functions? Check all that applies. a. heat b, pressure c. volume d. work e. temperature f. enthalpyOnly typed explanation otherwise leave it A system releases 255kJ of heat and does 118kJ of work on the surroundings. What is the change in internal energy of the system?
- The ΔHreaction for the combustion of ethanol (CH3CH2OH) is -1,370.7 kJ/mol. If 100.0 g of ethanol (CH3CH2OH) reacts with 3.000 X 1024 molecules of oxygen gas, how kJ of heat will be released? Show work/to really explain approach please.Pls answer in units of enthalpy. Pls see both documents to answer.Compute ΔGo at 200.0 oC for each of the following reactions, which are important in the chemistry of coal. Assume that coal has the same thermodynamic properties as graphite. Substance ΔHo(kJ/mol) So(J/(mol*K)) C(graphite) 0 5.7 H2O(g) -241.83 188.835 CO(g) -110.5 197.7 H2(g) 0 130.680 O2(g) 0 205.152 CO2(g) -393.5 213.8 C(s, coal) + H2O(g) CO(g) + H2(g) C(s, coal) + O2(g) CO2(g) C(s, coal) + 1/2O2(g) CO(g) CO(g) + H2O(g) CO2(g) + H2(g)
- Heat is added to a system, and the system dose 52 J of work. If the internal energy increase by 14 J, how much heat was added to the system? Show procedure and the final resultprocess Practice-How much heat, in kJ, is required to raise the temperature of 12 g of benzene from -10.0 °C to 25.0°C? Please provide only typed answer solution no handwritten solution needed allowedAfter 250 kJ of heat is added to a system, the internal energy of the system increases by 200 kJ. The external pressure remains constant during the process. What is q, w, ΔH and ΔE? ( Please type answer note write by hend )
- In chemistry, enthalpy changes are defined as_____. Select one: a. all options are correct; b. being negative for exothermic (heat-generating) processes; c. being positive for endothermic (heat-absorbing) processes;Suppose that 120 g of water and 150 g of ethanol, which are at 5 °C and in different containers, are heated in the same heat source that supplies 8 kJ/min, until the alcohol reaches 25 °C. (Consider: specific heat of water is 1 cal/g °C and of ethanol is 0.6 cal/g °C). Answer: a) How long and at what temperature will the water reach until there is the same amount of heat that the system containing ethanol absorbed when it reached 25 °C? b) If the two systems are heated during the same period, theoretically which liquid should indicate a higher temperature? Explain in detail. c) Explain how interaction forces influence the thermal capacity and specific heat of materials.A 8.31 gram sample of methanol was combusted in a bomb calorimeter. The temp of the calorimeter increased by 12.14 degrees C. If the molar mss of methanol is 32.04 g/mol, and heat capacity of calorimeter is 5,435 J/degree C, what is the molar deltaE for this reaction, in kJ/mol? Sig figs please.
