Q6. Calculate the amount of heat (kcal) released when 50.0 g of steam at 100°C hits the skin and condenses.

A pure solid sample of Substance X is put into an evacuated flask. The flask is heated at a steady rate and the temperature recorded as time passes. Here is a graph of the results: 70. 50. temperature (°C) 30. 10. - 10. 0. 10. What is the melting point of X ? 20. Use this graph to answer the following questions: heat added (kJ/mol) What phase (physical state) of X would you expect to find in the flask after 12 kJ/mol of heat has been added? 30. °C 0 0 0 40. (check all that apply) solid liquid gas 50.

2 You may want to reference Section 3.7 (Pages 80-87) while completing this problem. Using the values for the heat of fusion, specific heat of water, and/or heat of vaporization, calculate the amount of heat energy in each of the following. Keep in mind that the sign of the heat involved in the state change is ignored. W Alt Jill # 3 F3 E x X C $ F4 4 R 8 % V SD F G 5 2 F5 5 HH T Fó Q Search 6 Y H 6 F7 ▼ & L Part A 7 Calculate the joules released when 145 g of steam condenses at 100 °C and the liquid cools to 35.0 °C. Express your answer to three significant figures and include the appropriate units. ASUS Value FB U HA Submit Previous Answers Request Answer * 56 X Incorrect; Try Again; 4 attempts remaining 8 BN M FO I J K D I 9 v → J 1 FIO Alt O D L BINET O ON/OFF Ctrl 0 ? P 10 : F12 I { Prt Sc [ A + = I Review | Constants | Periodic Table Insert } ] 165 Delete Backspace 1 Enter 12:06 AM 2/2/2023 ☺. ▷ Home Shift t PgUp O PgDn End Fn

Use the information provided below to calculate the quantity of heat (in kJ) required to convert 52.55 g of substance A from an initial temperature of -7.048°C to a final temperature of 129.6°C. The molar mass of the substance is 25.28 g/mol. Melting Point of A = 3.459°C Heat of fusion = 10.39 kJ/mol %3D %3D Boiling point of A = 107.3°C Heat of vaporization = 72.43 kJ/mol Solid Liquid Gas Specific heat (J/g°C) 2.05 4.74 6.52 Report your answer to the tenths place and do not include units.