Chemistry, 09.07.2019 13:00 boomerjm

1)an unknown solution is heated from 25°c to 78°c. it has a mass of 3.98g. solve for the unknown variables. is the reaction endothermic, or exothermic? 2) over time a solution has a final temperature of -35°c, and a change in temperature of 5°c. what state of matter is the substance? is the reaction endothermic, or exothermic? 3) a frozen glass of water is placed in a freezer, and becomes 25°c colder than its original temperature. it has a volume of 23.8g. how much energy was converted? was this endothermic, or exothermic? 4) a 8g glass of water has evaporated and it’s content is floating in a locked container. when you find the container it is at 125°c, you begin to cool the container and then find a temperature of 105°c. what is the enthalpy of said rxn? 5) how much energy was used to convert 45g of water from a solid to a liquid?

Answers: 1

Show answers

Another question on Chemistry

Chemistry, 22.06.2019 13:30

The atomic number, or number, is the described as the number of in the nucleus of an chemical element.

Answers: 1

Answer

Chemistry, 22.06.2019 19:00

How many liters of ethylene glycol antifreeze (c2h6o2), with a density of 1.100 g/l, would you add to your car radiator containing 15.0 kg of water if you needed to protect your engine to - 21.5°c? for water, kf = 1.86°c m -1.

Answers: 1

Answer

Chemistry, 22.06.2019 19:20

Consider hydrogen in an excited state n = 5n=5 that emits photons to reach the ground state. there are various possible transitions other than straight to the ground state that can occur; for example, it can drop to the n = 3n=3 state followed by the n = 3n=3 to the ground state transition. which of the possible transitions will result in the emission of a photon in the visible region?

Answers: 3

Answer

Chemistry, 23.06.2019 05:30

What is the largest environment on earth?

Answers: 3

Answer

You know the right answer?

1)an unknown solution is heated from 25°c to 78°c. it has a mass of 3.98g. solve for the unknown var...

Questions

Chemistry, 18.03.2021 02:40

A 2135 ml sample of dry air has a pressure of 98.4 kPa at 127°C. What is the volume of the sample if the temperature is increased to 206°C when the p...