By using formula q= C * m *
t
q = 1 * 250g * 20 ( density of water is 1 g/ml so 250 ml of water will weigh 250 g)
q= 5000 cal.
4. Determine how many calories of heat are needed to raise the temperature of 250. mL...
Assuming that radiation with a wavelength = 15.0 cm is used, that all the energy is converted to heat, and that 4.184 J is needed to raise the temperature of 1.00 g of water by 1.00 degree celcius, how many photons are necessary to raise the temperature of a 350 mL cup of water from 25 degree C to 95 degree C?
1- How much heat energy would be needed to convert 400g of gold at room temperature (25 ° C) to gold vapor at 3000 ° C? 2- How much heat energy would need to be removed from 800g of ethyl alcohol (ethanol) at 160 ° C and convert it into a solid at - 300 "c? 3- If 1200 calories of heat energy is added to 1.7 g diamond cutting tool that is at 25 ° C, what will be...
How many kJ of heat are needed to raise the temperature of 50mg of water by 10.64 degrees C. Given: Concentration NaOH = 0.05moles Molar Enthalpy for dissolution of NaOH = -44517.8J Molar Mass of NaOH = 40g/mol Volume of water = 1.71 x10^15L
It takes 100,000 calories to raise 1 kilogram of water by 100 degree C. How many calories does it take to raise the temperature of an equal volume of lead by 100 degree C? And how many calories to raise an equal weight of lead by 100 degree C? Explain the difference between a calorie and a Calorie. What units are used to describe the heat (or energy)value of food? A ten foot pole is jammed under a 200 pound...
2.3. V 2.40 How many calories of heat are required to change 12 g of ice from -10°C to water at 25°C? [Given: Cice=0.5 cal/g/°C; Cwater = 1 cal/g/°C] Calorimeter problem to find the specific heat of lead: If 110 g of lead shot at 120°C is dropped into 60 g of water at 25°C contained in a copper calorimeter of 45 g mass, what is the resulting temperature? [Given: Cwater I cal/g/°C; Cpb*** 0.031 cal/g/°C; Ccu = 0.093 cal/g/°C]
How many kJkJ of heat are needed to raise the temperature of 15.00 kgkg of liquid water from 24.4 °C to 46.3 °C ?
3. Calculate the heat absorbed by 25.0 g of water needed to raise its temperature from 20.0°C to 65.0°C. The specific heat of water is 4.18 J/gºC. Show your work Final Answer 4. Aluminum metal has a specific heat of 0.901 J/g C. How much heat is transferred to a 6.75 g piece of aluminum initially at room temperature, 20.0°C, when it is placed into boiling water? The temperature of boiling water is 100°C. Show your work Final Answer 5....
How many calories are needed to raise the temperature by one degree a)Celsius?,b)fahrenheit ?
Heat of Neutralization: Determine DeltaT in (C) and calculate the total number of calories produced. the density of the 0.500 M NaCl produced is 1.02 g/mL, and its specific heat is 0.960 cal/g x C. Calculate the heat of neutralization per mole of water produced. Volume of HCl: 50.0 mL Concentration of HCl: 1.00 M Volume of NaOH: 50.0 mL Concentration of NaOH: 1.00 M Initial temperature: 29.0 C Final Temp 26.8 C
1. How much heat is needed to raise the temperature of 3 kg of water from 20oC to 40oC? Give answer in kJ (1kJ = 1000 J) (round answer to 3 sig fig) 2. How much heat is needed to raise the temperature of 3 kg of ice from -40oC to -20oC? (round answer to 3 sig fig) Specific heat of water: C = 4180 J/kgK Specific heat of ice: C = 2090 J/kgK Specific heat of ethanol: C= 2440...