There are three sets of sketches below, showing the same pure molecular compound (sulfur dioxide, molecular formula SO₂) at three different temperatures. The sketches are drawn as if a sample of sulfur dioxide were under a microscope so powerful that individual atoms could be seen. Only one sketch in each set is correct. Use the slider to choose the correct sketch in each set. You may need the following information: melting point of SO₂: -72.0 °C boiling point of SO₂: -10.0°C -23. °C B - 102. °C с 121. °C

Calculate the amount of heat (in joules) required to heat 43 grams of water from 28°C to the normal boiling point (100°C)

question 9

3. The atmospheric pressure at 7000 ft is 0.700 atm. What is the boiling point of water at this altitude? (The boiling point of water is 100°C at 1 atm pressure.)

During a phase change, the temperature remains constant although heat is still being added. What is the best explanation for what the heat energy is being used to do? moving the particles closer together breaking chemical bonds to form brand new substances increasing the movement of particles weakening or breaking the intermolecular forces

Chemistry written by hand please.

Please answer question 3.

Which diagram corresponds to pure methanol (CH3OH)? (The normal boiling point of methanol is 64.70°C.) O CH, но O CH, HO. O CH, он он

Octane(C3H18) is a hydrocarbon found in crude oil. Thermochemical data for octane is provided below. The total change in enthalpy is 15.94 kJ when heating 0.2500 moles of octane from -70.00°C to 100.0°C. Determine the AHfusion. Melting point: -57.00 °C Boiling point: 126.0 °C J Csolid : 185.0 °C mol J Cliquid: 254.0 °C mol J Cgas: 250.0 °C mol AHvap: 34.40 kJ/ mol Molar mass: 114.23 g/mol 0.2693 kJ/mol 4.720 kJ/mol O 21.50 kJ/mol 0.2540 J/mol

When the solid and liquid phase are in equilibrium, which phase, solid or liquid contains h greater amount of energy? Explain