Question 13 4 pts 734 J of thermal energy is added to a 155 g sample...
. A 6.75 g sample of gold (specific heat capacity = 0.130 J/g。C) is heated using 50.6 J of energy. If the original temperature of the gold is 25.0°C, what is its final temperature? A. 24.4°C C. 82.7°C D. 43.4°C
Question 12 4 pts A 8.50 g sample of copper metal at 22.0°C is heated by the addition of 155 J of energy. The final temperature of the copper is °C. The specific heat capacity of copper is 0.38 J/gK Hint: q = cx mx AT-cx mx (Tonal - Tinitia) 22 70 090 110
When 702.5 J of heat energy is added to a 53.0 g sample of solid copper, the temperature increases to 87.6°C. What was the original temperature of the solid in °C? The specific heat capacity of solid copper is 0.385 J/g • K.
Exactly 1000 J of energy as heat are added to an 8.50 g sample of helium at 20.0 °C under constant-pressure. The specific heat capacity at constant-pressure for helium is 5.1926 kJ kg-1 K-1. What is the final temperature of the helium sample? 316 K 22.7 K 273 K 89.6 K 363 K
155 gas a5 points) A 5.00 g sample of water Vapor, initially at 155°C is cooled at atmospheric pressure, producing ice at -55.0 °C. Use the following data:(specific heat capacity of ice is 2.09 J/god specific heat capacity of liquid water is 4.18 J/g C; d specific heat capacity of water vapor is 1.84 J/g°C) heat of fusion of ice is 336 J/g heat of vaporation of water is 2260 J/g. Кир a) Draw the cooling curve for the problem....
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17. How many JOULES of energy are needed to warm 4.37 g of silver (Ag) from 25.0 c to 27.5 C? The specific heat of silver is 0.24c a. 0.14J b. 2.6 c. 46 J d. 0.022 18. Given the table below of specific heat capacities, which one will experience the SMALLEST increase in temperature if 10.0 J of heat is added to 1.00 g of each of these substances? Water Cast iron Lead (Pb)...
1 A173.0g lead ball at 155°C is dropped into a calorimeter cup containing 210 g of water at 16.0°c. After equilibrium is reached, the temperature of water is increased to 18.2°C. What is the heat capacity of calorimeter? Assume that calorimeter and water are initially at the same temperature. (Specific heat of water is 4186 J/kg. C and specific heat of lead is 128 J/kg.C) 2. An unknown metal sample of 54 g at 108°C is dropped into a calorimeter...
Page < 4 > of 5 i 13. An organic compound that has the empirical formula CHO has a molecular mass of 145 amu. Its molecular formula is 14. When 20.0 g C formed? , and 60.0 g, react to form CO, and H.O, how many grams of water are 15. The amount of energy needed to heat 2.00 g mercury from 50.0°C to 85.0°C is 9.87 J. The specific heat capacity of this sample of mercury is 16. A...
A 150.0 g block of iron absorbs 750.0 J of thermal energy. The specific heat capacity of iron is 0.449 J/(g·◦C). The initial temperature of the block is 20.0 ◦C. What is its final temperature? (A) 111.3 ◦C (B) 31.1 ◦C (C) 22.2 ◦C (D) 20.4 ◦C (E) 8.86 ◦C
A 59.16 g sample of a substance is initially at 27.0 °C. After absorbing 1969 J of heat, the temperature of the substance is 175.1 °C. What is the specific heat (c) of the substance? When 1521 J of heat energy is added to 38.2 g of hexane, CH4, the temperature increases by 17.6°C. Calculate the molar heat capacity of CH4 Cp = J/(mol·°C)