What is the energy change when 21.0 grams of water cools from 53.0 °C to 20.5 °C?
Answer
By using the equation Q= m*c*deltaT
Q= energy = ? ; m = mass of water= 21 grams
c= specific heat of water= 4.184 J/gC
deltaT= temperature change = 53-20.5= 32.5 degree C
now
Q= 21*4.184*32.5=2855.6 J
What is the energy change when 21.0 grams of water cools from 53.0 °C to 20.5...
UJI 1 poml) 1st attempt What is the energy change when 31.0 grams of water cools from 72.0 °C to 12.5 °C? O OF 6 QUESTIONS COMPLETED 1
A Styrofoam cup holding 100 g of hot water at 84°C cools to room temperature, 21.0°C. What is the change in entropy of the room? Neglect the specific heat of the cup and any change in temperature of the room. J/K
Part C the energy lost when 74.5 g of water cools from 86.4 C to 4.7 C SubmitP Previous Answers Request Answer Incorrect: Try Again Part D
1. How much energy is need to change 125 grams of water from 25 oC to 98 oC ? 2. How much energy is given off when 200 grams of ethanol are cooled from 65 oC to 13 oC? Specific Heat of ethanol is 2.46 J/g oC. 3. The heat capacity of iron is 0.444 J/goC. What is the final temperature when 20 grams of iron wire at 80 oC losses 577.2 J? 4. A 56.0 grams of copper cylinder...
joules lost when 78.1 g of water cools from 86.4∘C to 3.6 ∘C
both if em please
What is the energy change when the temperature of 13.9 grams of solid silver is decreased from 39.0 °C to 22.2°C ? Answer: Joules. How much energy is required to raise the temperature of 13.7 grams of gaseous hydrogen from 24.3 °C to 39.9 °C ? Answer: Joules
What is the energy change when the temperature of 14.5 grams of gaseous oxygen is decreased from 35.3 °C to 20.6 °C ?
What is the energy change when the temperature of 13.2 grams of gaseous neon is decreased from 37.3 °C to 21.6 °C ?
What is the energy change when the temperature of 12.5 grams of solid silicon is increased from 24.6 °C to 36.6 °C?
What is the energy change when the temperature of 14.6 grams of gaseous krypton is decreased from 36.8 °C to 23.3 °C ? Answer: Joules